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How many matrices of different orders ar...

How many matrices of different orders are possible with elements comprising all prime numbers less than 30 ?

A

2

B

3

C

4

D

6

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NDA PREVIOUS YEARS-QUESTION PAPER 2021-MULTIPLE CHOICE QUESTIONS
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  2. If A and B are two matrices such that AB if of order n xx n, then whic...

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  3. How many matrices of different orders are possible with elements compr...

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  4. A=|(p,q),(r,s)| where p, q, r and s are any four different prime num...

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  5. If A and B are square matrices of order 2 such that det(AB) = det(BA),...

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  6. What is cot 2x cot 4x -cot4x cot 6x- cot6x cot 2x equal to ?

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  7. If M is the mean of n observations x(1)-k, x(2)-k, x(3)-k,…., x(n)-k, ...

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  8. What is the sum of deviations of the variate values 73, 85, 92, 105, 1...

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  9. Let x be the HM and y be the GM of two positive numbers m and n. If 5x...

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  10. If the mean of a frequency distribution is 100 and the coefficient of ...

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  11. Let two events A and B be such that P(A)=L , P(B)=M and P(AuuB)=1. Whi...

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  12. For which of the following sets of numbers do the mean, median and mod...

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  13. The mean of 12 observations is 75. If two observations are discarded, ...

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  14. If k is one of the roots of the equation x(x+1)+1=0, then what is its ...

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  15. The geometric mean of a set of observations is computed as 10. The geo...

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  16. If P(A cup B) = (5)/(6), P (A cap B) = (1)/(3) and P(barA) =(1)/(2), t...

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  17. The average of a set of 15 observations is recorded, but later it is f...

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  18. A coin is tossed twice. If E and F denote occurrence of head on first ...

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  19. In a binomail distribution , then mean is (2)/(3) and the variance is...

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  20. If the mode of the scores 10, 12, 13, 15, 15, 13, 12, 10, x is 15, the...

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