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Question Number 180733 by srikanth2684 last updated on 16/Nov/22
$${let}\:{X}\:{have}\:{a}\:{Bernoulli}\:{distribution}\: \\ $$$${with}\:{mean}\:\mathrm{0}.\mathrm{4}\:,\:{then}\:{the}\:{variance} \\ $$$${of}\:\mathrm{2}{X}−\mathrm{3}\:{is} \\ $$$${pls}\:{solve} \\ $$