# Mathematics-Probability (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 1 - 7 of 13

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 1058 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 450.00 or

How to register?

## Question number: 1

» Mathematics » Probability

MCQ▾

### Question

The mid value of a class interval is 42. If the class size is 10, then the upper and lower limits of the class are

### Choices

Choice (4) Response

a.

47.5 and 37.5

b.

47 and 37

c.

37.5 and 47.5

d.

37 and 47

## Question number: 2

» Mathematics » Probability

MCQ▾

### Question

Two coins are tossed simultaneously. The probability of getting one head is

### Choices

Choice (4) Response

a.

1/4

b.

1/2

c.

1/3

d.

3/4

## Question number: 3

» Mathematics » Probability

MCQ▾

### Question

What is the probability of getting at least one head when two coins are tossed simultaneously?

### Choices

Choice (4) Response

a.

0.5

b.

0.66

c.

0.75

d.

0.25

## Question number: 4

» Mathematics » Probability

MCQ▾

### Question

Mohan lies on 3 days out of the 7 days in a week, whereas Ram lies on 4 days out of 6 days of a week. If both of them were asked a question, what is the probability that both gave a true reply?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 5

» Mathematics » Probability

MCQ▾

### Question

When two dice are rolled together, the probability of getting an even number on one dice and a multiple of 3 on the other, is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 6

» Mathematics » Probability

MCQ▾

### Question

An unbiased dice is rolled twice, what is the probability of not getting a 2 in any one of the two rolls?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 7

» Mathematics » Probability

MCQ▾

### Question

A bag contains 20 balls out of which x are black. If 10 more black balls are put in the box, the probability of drawing a black ball is double of what it was before. The value of x is

### Choices

Choice (4) Response

a.

40

b.

10

c.

5

d.

0