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The probability of getting at least 3 heads in 8 tosses of an unbiased coin is A. 197/256 B.199/256 C.219/256 D.217/256
lohita Prava
CA Foundation
★ 35
13-Jun-20 09:17
373
Answers (4)
P(x=r) = nCx * Px * (1 â?? P)n â?? x n=8; p=1/2; r=3 r=3x, 4x, 5x, 6x, 7x, 8x When you solve by substituting it we get,c) 219/256
Lavanya Chitturi
CA Inter
★ 895
13-Jun-20 16:22
Mam I didn't understand the first step and the third step
Thread Starter
13-Jun-20 17:05
You have to substitute the n,r,p,q values in the equation of binomial probability given in step 1
15-Jun-20 09:00
I think you understand now
Prasanth kumar Kamisetty
★ 12K+
28-Jun-20 14:02