Menu Close

Category: None

The-probability-that-the-birth-days-of-six-different-persons-will-fall-in-exactly-two-calendar-months-is-

Question Number 76774 by benjo 1/2 santuyy last updated on 30/Dec/19 $$\mathrm{The}\:\mathrm{probability}\:\mathrm{that}\:\mathrm{the}\:\mathrm{birth}\:\mathrm{days}\:\mathrm{of} \\ $$$$\mathrm{six}\:\mathrm{different}\:\mathrm{persons}\:\mathrm{will}\:\mathrm{fall}\:\mathrm{in}\:\mathrm{exactly} \\ $$$$\mathrm{two}\:\mathrm{calendar}\:\mathrm{months}\:\mathrm{is} \\ $$ Commented by mr W last updated on…

15-persons-among-whom-are-A-and-B-sit-down-at-random-at-a-round-table-The-probability-that-there-are-4-persons-between-A-and-B-is-

Question Number 76740 by benjo 1/2 santuyy last updated on 30/Dec/19 $$\mathrm{15}\:\mathrm{persons},\:\mathrm{among}\:\mathrm{whom}\:\mathrm{are}\:{A}\:\mathrm{and}\:{B}, \\ $$$$\mathrm{sit}\:\mathrm{down}\:\mathrm{at}\:\mathrm{random}\:\mathrm{at}\:\mathrm{a}\:\mathrm{round}\:\mathrm{table}. \\ $$$$\mathrm{The}\:\mathrm{probability}\:\mathrm{that}\:\mathrm{there}\:\mathrm{are}\:\mathrm{4}\:\mathrm{persons} \\ $$$$\mathrm{between}\:{A}\:\mathrm{and}\:{B}\:\mathrm{is} \\ $$ Commented by mr W last…

If-the-sum-of-p-terms-of-an-AP-is-q-and-the-sum-of-q-terms-is-p-then-the-sum-of-p-q-terms-will-be-

Question Number 11178 by 786786AM last updated on 15/Mar/17 $$\mathrm{If}\:\mathrm{the}\:\mathrm{sum}\:\mathrm{of}\:{p}\:\mathrm{terms}\:\mathrm{of}\:\mathrm{an}\:\mathrm{AP}\:\mathrm{is}\:{q}\:\mathrm{and}\: \\ $$$$\mathrm{the}\:\mathrm{sum}\:\mathrm{of}\:{q}\:\mathrm{terms}\:\mathrm{is}\:{p},\:\mathrm{then}\:\mathrm{the}\:\mathrm{sum}\:\mathrm{of} \\ $$$${p}+{q}\:\:\mathrm{terms}\:\mathrm{will}\:\mathrm{be} \\ $$ Commented by ajfour last updated on 15/Mar/17 $${dont}\:{you}\:{mean}\:{first}\:{p}\:{terms}, \\…

In-a-quadratic-equation-ax-2-bx-c-0-a-b-c-are-distinct-primes-and-the-product-of-the-sum-of-the-roots-and-product-of-the-roots-is-91-9-Find-the-absolute-value-of-difference-between-the-sum-o

Question Number 76401 by saupriyadip571@gmail.com last updated on 27/Dec/19 $$\mathrm{In}\:\mathrm{a}\:\mathrm{quadratic}\:\mathrm{equation}\:{ax}^{\mathrm{2}} −{bx}+{c}=\mathrm{0}, \\ $$$${a},{b},\:{c}\:\:\mathrm{are}\:\mathrm{distinct}\:\mathrm{primes}\:\mathrm{and}\:\mathrm{the}\:\mathrm{product} \\ $$$$\mathrm{of}\:\mathrm{the}\:\mathrm{sum}\:\mathrm{of}\:\mathrm{the}\:\mathrm{roots}\:\mathrm{and}\:\mathrm{product}\:\mathrm{of} \\ $$$$\mathrm{the}\:\mathrm{roots}\:\mathrm{is}\:\frac{\mathrm{91}}{\mathrm{9}}\:.\:\mathrm{Find}\:\mathrm{the}\:\mathrm{absolute}\:\mathrm{value}\:\mathrm{of} \\ $$$$\mathrm{difference}\:\mathrm{between}\:\mathrm{the}\:\mathrm{sum}\:\mathrm{of}\:\mathrm{the}\:\mathrm{roots} \\ $$$$\mathrm{and}\:\mathrm{the}\:\mathrm{product}\:\mathrm{of}\:\mathrm{the}\:\mathrm{roots}. \\ $$ Answered by…

The-number-of-terms-in-the-expansion-of-1-2x-x-2-20-when-expanded-in-descending-powers-of-x-is-

Question Number 10544 by j.masanja06@gmail.com last updated on 17/Feb/17 $$\mathrm{The}\:\mathrm{number}\:\mathrm{of}\:\mathrm{terms}\:\mathrm{in}\:\mathrm{the}\:\mathrm{expansion}\:\mathrm{of} \\ $$$$\left(\mathrm{1}+\mathrm{2}{x}+{x}^{\mathrm{2}} \right)^{\mathrm{20}} \mathrm{when}\:\mathrm{expanded}\:\mathrm{in}\:\mathrm{descending} \\ $$$$\mathrm{powers}\:\mathrm{of}\:{x},\:\mathrm{is} \\ $$ Commented by FilupS last updated on 18/Feb/17…

Let-OA-i-3j-2k-and-OB-3i-j-2k-The-vector-OC-bisecting-the-AOB-and-C-being-a-point-on-the-line-AB-is-

Question Number 75925 by benjo last updated on 21/Dec/19 $$\mathrm{Let}\:\overset{\rightarrow} {{OA}}=\:\boldsymbol{\mathrm{i}}+\mathrm{3}\boldsymbol{\mathrm{j}}−\mathrm{2}\boldsymbol{\mathrm{k}}\:\mathrm{and}\:\overset{\rightarrow} {{OB}}=\mathrm{3}\boldsymbol{\mathrm{i}}+\boldsymbol{\mathrm{j}}−\mathrm{2}\boldsymbol{\mathrm{k}}. \\ $$$$\mathrm{The}\:\mathrm{vector}\:\overset{\rightarrow} {{OC}}\:\mathrm{bisecting}\:\mathrm{the}\:\angle{AOB}\:\mathrm{and} \\ $$$${C}\:\:\mathrm{being}\:\mathrm{a}\:\mathrm{point}\:\mathrm{on}\:\mathrm{the}\:\mathrm{line}\:{AB}\:\mathrm{is} \\ $$ Terms of Service Privacy Policy Contact:…

A-group-of-30-men-participate-in-a-survey-of-telecom-companies-The-number-of-men-who-use-both-Idea-and-Airtel-internet-was-equal-to-the-number-of-men-who-use-neither-of-these-inernets-The-number-o

Question Number 75899 by gugum last updated on 20/Dec/19 $$\mathrm{A}\:\mathrm{group}\:\mathrm{of}\:\mathrm{30}\:\mathrm{men}\:\mathrm{participate}\:\mathrm{in}\:\mathrm{a}\: \\ $$$$\mathrm{survey}\:\mathrm{of}\:\mathrm{telecom}\:\mathrm{companies}.\:\mathrm{The} \\ $$$$\mathrm{number}\:\mathrm{of}\:\mathrm{men}\:\mathrm{who}\:\mathrm{use}\:\mathrm{both}\:\mathrm{Idea}\: \\ $$$$\mathrm{and}\:\mathrm{Airtel}\:\mathrm{internet}\:\mathrm{was}\:\mathrm{equal}\:\mathrm{to} \\ $$$$\mathrm{the}\:\mathrm{number}\:\mathrm{of}\:\mathrm{men}\:\mathrm{who}\:\mathrm{use}\:\mathrm{neither} \\ $$$$\mathrm{of}\:\mathrm{these}\:\mathrm{inernets}.\:\mathrm{The}\:\mathrm{number}\:\mathrm{of}\:\mathrm{men} \\ $$$$\mathrm{who}\:\mathrm{use}\:\mathrm{Idea}\:\mathrm{is}\:\mathrm{4}\:\mathrm{more}\:\mathrm{than}\:\mathrm{those} \\ $$$$\mathrm{who}\:\mathrm{use}\:\mathrm{Airtel}.\:\mathrm{How}\:\mathrm{many}\:\mathrm{use}\:\mathrm{Airtel} \\…

One-pipe-can-fill-a-tank-in-40-minutes-and-an-outlet-pipe-can-empty-the-full-tank-in-24-minutes-If-both-the-pipes-are-opened-simultaneously-what-time-will-it-take-for-the-full-tank-to-be-emptied-

Question Number 75896 by gugum last updated on 20/Dec/19 $$\mathrm{One}\:\mathrm{pipe}\:\mathrm{can}\:\mathrm{fill}\:\mathrm{a}\:\mathrm{tank}\:\mathrm{in}\:\mathrm{40}\:\mathrm{minutes} \\ $$$$\mathrm{and}\:\mathrm{an}\:\mathrm{outlet}\:\mathrm{pipe}\:\mathrm{can}\:\mathrm{empty}\:\mathrm{the}\:\mathrm{full} \\ $$$$\mathrm{tank}\:\mathrm{in}\:\mathrm{24}\:\mathrm{minutes}.\:\mathrm{If}\:\mathrm{both}\:\mathrm{the}\:\mathrm{pipes} \\ $$$$\mathrm{are}\:\mathrm{opened}\:\mathrm{simultaneously},\:\mathrm{what}\:\mathrm{time} \\ $$$$\mathrm{will}\:\mathrm{it}\:\mathrm{take}\:\mathrm{for}\:\mathrm{the}\:\mathrm{full}\:\mathrm{tank}\:\mathrm{to}\:\mathrm{be} \\ $$$$\mathrm{emptied}? \\ $$ Answered by mr…

A-garrison-had-provisions-for-1500-men-for-30-days-After-some-days-300-more-men-joined-the-garrison-The-provisions-lasted-for-a-total-of-26-days-from-the-beginning-After-how-many-days-did-the-new-

Question Number 75895 by gugum last updated on 20/Dec/19 $$\mathrm{A}\:\mathrm{garrison}\:\mathrm{had}\:\mathrm{provisions}\:\mathrm{for}\:\mathrm{1500}\:\mathrm{men} \\ $$$$\mathrm{for}\:\mathrm{30}\:\mathrm{days}.\:\mathrm{After}\:\mathrm{some}\:\mathrm{days},\:\mathrm{300}\:\mathrm{more} \\ $$$$\mathrm{men}\:\mathrm{joined}\:\mathrm{the}\:\mathrm{garrison}.\:\mathrm{The}\:\mathrm{provisions} \\ $$$$\mathrm{lasted}\:\mathrm{for}\:\mathrm{a}\:\mathrm{total}\:\mathrm{of}\:\mathrm{26}\:\mathrm{days}\:\mathrm{from}\:\mathrm{the} \\ $$$$\mathrm{beginning}.\:\mathrm{After}\:\mathrm{how}\:\mathrm{many}\:\mathrm{days}\:\mathrm{did} \\ $$$$\mathrm{the}\:\mathrm{new}\:\mathrm{men}\:\mathrm{join}? \\ $$ Answered by mr…