EX 32.2 Q5 10 coins are tossed simultaneously. Find the probability of getting(i) exactly

Answer :

(i) As 10 coins are tossed simultaneously the total number of outcomes are =1024.

the favourable outcomes of getting exactly 3 heads will be

10C3 = 120

Thus, the probability

Hence, the probability is .

(ii) As 10 coins are tossed simultaneously the total number of outcomes are =1024.

the favourable outcomes of getting not more than 4 heads will be

10C0 + 10C1 + 10C2 + 10C3 + 10C4 = 386

Thus, the probability

Hence, the probability is .

(iii) As 10 coins are tossed simultaneously the total number of outcomes are =1024.

the favourable outcomes of getting at least 4 heads will be

10C4 + 10C5 + 10C6 + 10C7 + 10C8 + 10C9 + 10C10 = 848

Thus, the probability

Hence, the probability is .

Trả lời

Email của bạn sẽ không được hiển thị công khai.