Question

Question 4 Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes:

Outcome 3 heads 2 heads 1 head No head
Frequency 23 72 77 28

If the three coins are simultaneously tossed again, compute the probability of 2 heads coming up.

Class 9 - Math - Probability Page 283

Answer 1

Hi friend..


Three coins are tossed 200 times ,so that the total number of trials is 200.

Probability of getting 2 heads.

==No.of outcomes having 2 heads /Total no.of trials


=73/200

=9/25Ans.


Hope it is helpful...

Answer 2

Probability is the study of the chances of events happening.

Required probability=number of trials in which the event E has happened/Total number of trials

A coin has two sides head(H) and tail(T).

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Solution:

Number of times 2 heads come up = 72

Total number of times the coins were tossed = 200

Required probability, P(2 heads) = 72/200 = 9/25

P(2 heads)= 9/25

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Hope this will help you....