Probability CBSE Questions & Answers

Probability

This is Mathematics Class 09 Probability CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
A and B throw a pair of dice. If A throws 9, then B’s chance of throwing a higher number is
  • A
    \({{1} \over {9}}\)
  • B
    \({{1} \over {3}}\)
  • C
    \({{2} \over {9}}\)
  • D
    \({{1} \over {6}}\)
    Correct
2
A child has a block in the shape of a cube with one letter written on each face as shown in the following. The cube is thrown once. Then, the probability of getting ‘A’ is
Question 2 figure 1
  • A
    \({{1} \over {3}}\)
  • B
    \({{1} \over {6}}\)
  • C
    1
  • D
    \({{1} \over {2}}\)
    Correct
3
The probability of an event (other than sure and impossible event) lies between
  • A
    \({1 \over 2}\;and\;1\)
  • B
    0 and 1
    Correct
  • C
    \(0\;and{1 \over 2}\;\)
  • D
    - 1 and 1
4
Three unbiased coins are tossed together. The probability of getting at least two heads is
  • A
    \({1 \over 2}\;\)
    Correct
  • B
    \({1 \over 8}\;\)
  • C
    1
  • D
    \({3 \over 8}\;\)
5
Two dice are tossed. The probability of getting two 5’s is
  • A
    \({1 \over {6}}\)
  • B
    \({1 \over {2}}\)
  • C
    \({1 \over {18}}\)
  • D
    \({1 \over {36}}\)
    Correct
6
The probability expressed as a percentage of a particular occurrence can never be
  • A
    less than 0
    Correct
  • B
    less than 100
  • C
    anything but a whole number
  • D
    greater than 1
7
If P(A) denotes the probability of an event A, then
  • A
    \(0 \le P(A) \le 1\)
    Correct
  • B
    P(A) \( > \)1
  • C
    - 1 \( \le \) P(A) \( \le \)1
  • D
    P(A) \( < \) 0
8
A card is drawn from a deck of 52 cards. The even E is that card is not an ace of hearts. The number of outcomes favourable to E is
  • A
    4
  • B
    13
  • C
    51
    Correct
  • D
    48
9
The probability of getting a rotten egg in a lot of 400 is 0.035. the number of rotten eggs in the lot is
  • A
    28
  • B
    14
    Correct
  • C
    21
  • D
    7
10
One ticket is drawn at random from a bag containing tickets numbered 1 to 40. The probability that he selected tickets has a number which is a multiple of 5 , is
  • A
    \({1 \over 5}\)
    Correct
  • B
    \({1 \over 3}\)
  • C
    \({3 \over 5}\)
  • D
    \({4 \over 5}\)
11
Probability of an event cannot be
  • A
    \( - {1 \over 3}\)
    Correct
  • B
    \({2 \over 3}\)
  • C
    0.5
  • D
    25\(\% \)
12
A card is drawn from an ordinary pack and a gambler bets that it is a spade or an ace. Then, the odds against his winning the bet is
  • A
    it is 9 : 4
    Correct
  • B
    it is 13 : 4
  • C
    it is 4 : 9
  • D
    it is 9 : 4
13
Three coins are tossed. The probability of getting 2 heads and 1 tall is
  • A
    \({2 \over 3}\)
  • B
    1
  • C
    \({3 \over 8}\)
    Correct
  • D
    \({3 \over 4}\)
14
Three coins are tossed. The probability of getting neither 3 heads nor 3 tails is
  • A
    \({2 \over 3}\)
  • B
    \({1 \over 2}\)
  • C
    \({1 \over 3}\)
  • D
    \({3 \over 4}\)
    Correct
15
An integer is chosen at random from the first 100 integers. Then, the probability that this number will not be divisible by 5 or 8 is
  • A
    \({9 \over 10}\)
  • B
    \({7 \over 10}\)
    Correct
  • C
    \({1 \over 10}\)
  • D
    \({3 \over 10}\)