Question

Three coins are tossed simultaneously 350 times. The distribution of various outcomes are listed below:(1) three tails :- 55, (ii) two tails :- 95 (iii) one tail :- 120 (iv) no tail :- 80. Find the probability of getting all three heads. *

Answer 1

Answer:

Total no. of outcomes=150

(i) 3 tails

Favourable outcomes=24

P(E)=

150

24

=

15

4

(ii) 2 tails

Favourable outcomes=45

P(E)=

150

45

=

10

3

(iii) 1 tail

Favourable outcomes=72

P(E)=

150

72

=

25

12

(iv) 0 tail

Favourable outcomes=150−(24+45+72)=150−141=9

P(E)=

1