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If 8 coins are tossed what is the probability that no of heads are not less than no. of tails?
Asked by dipeshsharma969 | 10 Jun, 2022, 13:31: PM
answered-by-expert Expert Answer
Events of number of heads not less than number of tails if 8 coins are tossed are given below in the table
 
Event  Probability Probability
 4H+4T  8C4 (1/2)4 (1/2)4
 70×2-8
 5H+3T  8C5 (1/2)5 (1/2)3 56 ×2-8
 6H+2T  8C6 (1/2)6 (1/2)2 28 ×2-8
 7H+T  8C7 (1/2)7 (1/2) 8 ×2-8
 
hence probobility of getting number of heads not less than number of tails = ( 70 + 56+ 28+ 8 ) ×2-8 = 0.633
Answered by Thiyagarajan K | 12 Jun, 2022, 10:45: AM
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