Four fair dice are thrown independently 27 times. Then the expected number of times, at least twodice show up a three or a five, is

Question

Accepted Answer

Correct answer: 11. (11) Probability of getting at least two 3 's or 5 's in one trial = 4C_2 ( 13 )^2 ( 23 )^2+4C_3 ( 13 )^3 ( 23 )+4C_4 ( 13 )^4 = 333^4= 1127 E (x )= np=27 ( 1127 )=11

$Four fair dice are thrown independently 27 times. Then the expected number of times, at least twodice show up a three or a five, is$

Solution

More Probability PYQs