JEE Main – Paper I – Maths – Statistics and Probability – Test 3
No of questions – 10
Marks : 40(10×4)
Time : 15 mins
JEE Main – Paper I – Maths – Statistics and Probability – Test 3
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Question 1 of 10
1. Question
If in a frequency distribution , the mean and median are 21 and 22 respectively, then its mode is approximately
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Question 2 of 10
2. Question
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Question 3 of 10
3. Question
At a telephone enquiry system , the number of phone calls regarding relevant enquiry follow . poisson distribution with an average of 5 phone calls during 10 min time intervals . The propability that there is atmost one phone call during a 10 min time period , is
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Question 4 of 10
4. Question
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Question 5 of 10
5. Question
The average marks of boys in a class is 52 and that of girls is 42. The average marks of boys and girls combined is 50. The percentage of boys in the class is
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Question 6 of 10
6. Question
Two aeroplanes I and II bomb a target in succession . The propabilities of I and II scoring a hit correctly are 0.3 and 0.2 , respectively . The second plane will bomb only if the first misses the target . The propability that the target is hit by the second plane is
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Question 7 of 10
7. Question
A pair of fair dice is thrown independently three times .The propability of getting a score of exactly 9 twice is
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Question 8 of 10
8. Question
The mean of the numbers a,b,8,5,10 is 6 and the variance is 6.80. Then which one of the following gives possible values of a and b?
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Question 9 of 10
9. Question
A die is thrown . Let A be the event that the number obtained is greater than 3. Let B be the event that the number obtained is less than 5. Then
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Question 10 of 10
10. Question
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