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)
Answers
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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
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