JEE Main 2021 (Online) 27th August Morning Shift | Statistics Question 29 | Mathematics

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JEE Main 2021 (Online) 27th August Morning Shift

Numerical

-1

Let n be an odd natural number such that the variance of 1, 2, 3, 4, ......, n is 14. Then n is equal to _____________.

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JEE Main 2021 (Online) 26th August Evening Shift

Numerical

-1

Let the mean and variance of four numbers 3, 7, x and y(x > y) be 5 and 10 respectively. Then the mean of four numbers 3 + 2x, 7 + 2y, x + y and x $$-$$ y is ______________.

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JEE Main 2021 (Online) 25th July Morning Shift

Numerical

-1

Consider the following frequency distribution :

Class :	10-20	20-30	30-40	40-50	50-60
Frequency :	$$\alpha $$	110	54	30	$$\beta $$

If the sum of all frequencies is 584 and median is 45, then | $$\alpha$$ $$-$$ $$\beta$$ | is equal to _______________.

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JEE Main 2021 (Online) 22th July Evening Shift

Numerical

-1

Consider the following frequency distribution :

Class :	0 $$ - $$ 6	6 $$ - $$ 12	12 $$ - $$ 18	18 $$ - $$ 24	24 $$ - $$ 30
Frequency :	a	b	12	9	5

If mean = $${{309} \over {22}}$$ and median = 14, then the value (a $$-$$ b)² is equal to _____________.

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