# Statistics and Probability (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Math): Questions 1 - 3 of 9

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## Question number: 1

» Statistics and Probability » Probability of an Event

Appeared in Year: 2012

MCQ▾

### Question

Let denote the sum of the first n positive integers. The numbers S1, S2, S3, …, S99 are written on 99 cards. The probability of drawing a card with an even number written on it is –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 2

» Statistics and Probability » Probability of an Event

Appeared in Year: 2012

MCQ▾

### Question

A purse contains 4 copper coins and 3 silver coins. A second purse contains 6 copper coins and 4 silver coins. A purse is chosen randomly and a coin is taken out of it. What is the probability that is a copper coin –

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 3

» Statistics and Probability » Standard Deviation

Appeared in Year: 2014

MCQ▾

### Question

Let . A list of number has mean and standard deviation . A new list of numbers is made as follows: and for . The mean and the standard deviation of the list are and . Then which of the following is necessarily true?

### Choices

Choice (4) Response

a.

b.

c.

d.

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