Question

Three coins are tossed simultaneously 200
times with the following frequencies of
different outcomes
Outcomes
Frequency
3 heads
23
2 heads
72
1 head
77
Fi
No head
28
stu
Find the experimental probability of getting
(i) atmost 2 heads (ii) at least 2 heads
(CBSE 2016)​

Answer 1

Answer:

(i) 177/200 (ii) 19/40

Step-by-step explanation:

(i) Favourable outcomes = 72+77+28=177

Total outcomes = 200

P( atmost 2 heads) = 177/ 200

(ii) Favourable outcomes = 72+23=95

Total outcomes = 200

P(atleast 2 heads) = 95/200

= 19/40