Question # 1

n! stands for:

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product of first natural numbers

sum of n natural numbers

product of n integers

none of these

No. of arrangements can be made of 4 letters a, b, c, d taken 2 at a time ?

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8

12

10

14

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If ⁿP₂ = 30 then n = :

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5

6

2

3

No. of signals made by 4 flags of different colors using 2 flags at a time:

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6

12

60

none

No. of triangles can be formed by joining the vertices of the polygon having 5 sides ?

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10

15

20

none of these

ⁿC₄ =ⁿC₈then n = :

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4

12

8

6

One card is drawn at random from a pack of 52 cards. The probability that the card drawn a king is:

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none of these

A die is rolled. The probability that the dots on the top are greater than 4 is:

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5, 6

1

For a positive integer n:

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(n+1)! = (n+1)n!

(n+1)! = (n+1)(n-1)!

n! = n(n+1)!

none of these

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0

-1

>1

none

Probability of an impossible event is:

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0

1

-1

∞

How many different number can be formed by taking 4 out of the six digits 1, 2, 3, 4, 5, 6:

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360

120

366

none of these

Probability of a certain event is:

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0

1

>1

∞

In how many ways two places can be filled by n objects:

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n(n-1)

2!

n(n+1)

None

Numbers are formed by using all the digits 1, 2, 3, 4, 5, 6 on digit being repeated, then the numbers which are divisible by 5 are:

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110

120

122

124

No. of signals made by 5 flags of different colors using 3 flags at a time is:

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60

15

10

None

No. of selection of n different things out of n is:

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1

n

n!

none

The factorial of positive integer is:

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rational no.

positive integer

real no.

none

If S is a sample space and event E is S then P(E) is:

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0

1

>1

none

A key ring is an example of:

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permutation

circulation permutation

combination

none

A dice is rolled, the probability of getting a number which is even or greater than 4 is:

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none of these

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11th Class ICS Mathematics Chapter 7 Test Online MCQs With Answers

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