Q7 of 32 Page 25

A dice is rolled 600 times and the occurrence of the outcomes 1, 2, 3, 4, 5 and 6 are given below :





















Outcome



1



2



3



4



5



6



Frequency



200



30



120



100



50



100



The probability of getting a prime number is

Total trials = 600


No. Of getting prime number = 30+120+50 = 200


Let E be the event of getting a prime number so,


P(E) =

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5

Two coins are tossed simultaneously. The probability of getting atmost one head is

 6

A coin is tossed 1000 times, if the probability of getting a tail is 3/8, how many times head is obtained?

 8

The percentage of attendance of different classes in a year in a school is given below :





















Class:



X



IX



VIII



VII



VI



V



Attendance:



30



62



85



92



76



55



What is the probability that the class attendance is more than 75%?

 9

A bag is contains 50 coins and each coin is marked from 51 to 100. One coin is picked at random. The probability that the number on the coin is not a prime number, is