RRB Indian Railway Group 'D' Recruitment - General Mathematics>Chapter 6 - Binomial Theorem>Exercise 1>Q 23

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RRC Group D CBT

IMPORTANT

Earn 100

If xn occurs in the expansion of ${(x + \frac{1}{x})}^{n}$ then it’s coefficient must be

50% studentsanswered this correctly

Important Questions on Binomial Theorem

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RRC Group D CBT

IMPORTANT

RRB Indian Railway Group 'D' Recruitment - General Mathematics>Chapter 6 - Binomial Theorem>Exercise 1>Q 24

Six boys and six girls are seated in a row randomly. What is the probability that the boys and girls sit alternately?

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RRC Group D CBT

IMPORTANT

RRB Indian Railway Group 'D' Recruitment - General Mathematics>Chapter 6 - Binomial Theorem>Exercise 1>Q 25

If

{}^{15}C_{3 r} =^{15} C_{r + 3}

then

r =

?

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RRC Group D CBT

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RRB Indian Railway Group 'D' Recruitment - General Mathematics>Chapter 6 - Binomial Theorem>Exercise 1>Q 26

How many committees of

5

members can be formed from

6

gentlemen and

4

ladies?

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RRC Group D CBT

IMPORTANT

RRB Indian Railway Group 'D' Recruitment - General Mathematics>Chapter 6 - Binomial Theorem>Exercise 1>Q 27

How many even numbers can be formed using all the digits

2, 3, 4, 5, 6 ?

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RRC Group D CBT

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RRB Indian Railway Group 'D' Recruitment - General Mathematics>Chapter 6 - Binomial Theorem>Exercise 1>Q 28

There are three copies of each of

4

different books. In how many ways can they be arranged in a shelf?

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RRC Group D CBT

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RRB Indian Railway Group 'D' Recruitment - General Mathematics>Chapter 6 - Binomial Theorem>Exercise 1>Q 29

From a group of

5

boys and

3

girls, three people are chosen at random. Find the probability that there are more girls than boys.

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RRC Group D CBT

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RRB Indian Railway Group 'D' Recruitment - General Mathematics>Chapter 6 - Binomial Theorem>Exercise 1>Q 30

A and B are two independent events. The probability that both A and B occur is

\frac{1}{6}

and the probability that neither of them occur is

\frac{1}{3}

. Find the probability of A.

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RRC Group D CBT

IMPORTANT

RRB Indian Railway Group 'D' Recruitment - General Mathematics>Chapter 6 - Binomial Theorem>Exercise 1>Q 31

If the coefficients of

(2 r + 4)^{t h}

and

(r - 2)^{t h}

terms in the expansion of

(1 + x)^{18}

are equal ,then the value of r is?