Question

Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes:

3 heads 23

2 heads 72

1 head 77

no heads 28

find the probability of getting

( i) 3 heads

(ii) at least 2 heads


(iii) two heads and one tail

Answer 1

hello..
probability of getting 3 heads=no.of favorable outcome/total no.of outcome

=23/200

ii)probability of getting atleast 2 heads=no.of favorable outcome/total no.of outcome

=72+23/200

=95/200=19/40

iii)probability of getting 2 heads and 1tail=no.of favorable outcome/total no.of outcome

=72/200=9/25.
I hope it help you.

Answer 2

The answer is in the attachment.