SOLUTION: Please help me solve this in simple way. Thank You. Six coins are tossed. Find the probability of at least 4 heads. Answer:

Algebra ->  Probability-and-statistics -> SOLUTION: Please help me solve this in simple way. Thank You. Six coins are tossed. Find the probability of at least 4 heads. Answer:       Log On


   

Question 1119952: Please help me solve this in simple way. Thank You.
Six coins are tossed. Find the probability of at least 4 heads.
Answer:

Answer by math_helper(2461) About Me  (Show Source):
You can put this solution on YOUR website!
P(at least 4 heads) = P(exactly 4 heads) + P(exactly 5 H) + P(exactly 6 H)


= (6C4)/2^6 + (6C5)/2^6 + (6C6)/2^6

where nCr = n!/((n-r)!r!)

= (15 + 6 + 1) / 64
= 22 / 64
= +highlight%2811%2F32%29+ or 0.34375
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