JEE Main – Paper I – Maths – Statistics and Probability – Test 2
No of questions – 10
Marks : 40(10×4)
Time : 15 mins
JEE Main – Paper I – Maths – Statistics and Probability – Test 2
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Question 1 of 10
1. Question
One observation that was 20, was found to be wrong and was replaced by the correct value 30. Then the corrected variance is
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Question 2 of 10
2. Question
The median of a set of 9 distinct observation is 20.5 . If each of the largest 4 observations of the set is increased by 2, then the median of the new set
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Question 3 of 10
3. Question
The mean and the variance of a binominal distribution are 4 and 2 , respectively. Then , the propability of 2 successes is
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Question 4 of 10
4. Question
A random variable x has the propability distribution
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Question 5 of 10
5. Question
The propability that A speaks truth is 4/5 while this propability for B is 3/4 . The propability that they contradict each other when askedto speak on a fact , is
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Question 6 of 10
6. Question
In a series of 2 n observations, half of them equal a and remaining half equal a . If the standard deviation of the observations is 2,
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Question 7 of 10
7. Question
Consider the following statements
 Mode can be computed from histogram
 median is not independent of change of scale
 variance is independent of change of origin and scale
Which of these is / are correct?
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Question 8 of 10
8. Question
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Question 9 of 10
9. Question
Three houses are available in a locality , three persons apply for the houses. Each applies for one house without consulting others. The propability that all the three apply for the same house is
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Question 10 of 10
10. Question
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