1

JEE Main 2019 (Online) 10th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

If for some x $$ \in $$ R, the frequency distribution of the marks obtained by 20 students in a test is :

then the mean of the marks is

Marks | 2 | 3 | 5 | 7 |
---|---|---|---|---|

Frequency | (x + 1)^{2} |
2x - 5 | x^{2} - 3x |
x |

then the mean of the marks is

2

JEE Main 2019 (Online) 9th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

The mean and the median of the following ten
numbers in increasing order 10, 22, 26, 29, 34, x,
42, 67, 70, y are 42 and 35 respectively, then $${y \over x}$$ is equal to

3

JEE Main 2019 (Online) 9th April Morning Slot

MCQ (Single Correct Answer)

+4

-1

If the standard deviation of the numbers
ā1, 0, 1, k is $$\sqrt 5$$ where k > 0, then k is equal to

4

JEE Main 2019 (Online) 8th April Evening Slot

MCQ (Single Correct Answer)

+4

-1

A student scores the following marks in five tests
:

45, 54, 41, 57, 43.

His score is not known for the sixth test. If the mean score is 48 in the six tests, then the standard deviation of the marks in six tests is

45, 54, 41, 57, 43.

His score is not known for the sixth test. If the mean score is 48 in the six tests, then the standard deviation of the marks in six tests is

Questions Asked from Statistics (MCQ (Single Correct Answer))

Number in Brackets after Paper Indicates
No. of Questions

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