alleryIf the probability of an event is 0.3, the probability of it not happening is:
- 0
- 0.3
- 0.7
- 1.3
Show answer and solution
Correct answer: C. 0.7
P(not E) = 1 − 0.3 = 0.7.
UP Board Class 10 Statistics and Probability — practice questions — page 2
Explore 75 free Statistics and Probability questions in UP Board Class 10 Mathematics. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 31–60 of 75.
If the probability of an event is 0.3, the probability of it not happening is:Read the answer and worked solution →The probability of getting a number greater than 6 in a single roll of a die is:Read the answer and worked solution →A fair coin is tossed. What is the probability of getting a head?Read the answer and worked solution →A fair die is rolled. What is the probability of getting an even number?Read the answer and worked solution →What can the probability of an event NOT be?Read the answer and worked solution →If the probability of rain tomorrow is 0.4, what is the probability that it will NOT rain?Read the answer and worked solution →A die is rolled once. What is the probability of getting a number greater than 4?Read the answer and worked solution →A card is drawn at random from a standard deck. What is the probability of getting a king?Read the answer and worked solution →A card is drawn from a deck. What is the probability of a red face card?Read the answer and worked solution →Two dice are rolled. What is the probability of getting a sum of 8?Read the answer and worked solution →A bag has 4 red, 5 green and 6 blue balls. A ball is drawn at random. P(green)?Read the answer and worked solution →Two coins are tossed. What is the probability of getting exactly one head?Read the answer and worked solution →A card is drawn from a deck. What is the probability that it is neither a king nor a queen?Read the answer and worked solution →A bag has 4 red and 6 blue balls. One ball is drawn at random. What is the probability that it is NOT red?Read the answer and worked solution →A box has cards numbered 1 to 20. One card is drawn. What is the probability that the number is a perfect square?Read the answer and worked solution →A die is rolled. What is the probability of getting a prime number?Read the answer and worked solution →A card is drawn from a deck. What is the probability of getting a heart or a king?Read the answer and worked solution →Two dice are rolled. What is the probability that the product of the numbers is 12?Read the answer and worked solution →A box has 100 bulbs of which 4 are defective. One bulb is chosen at random. What is the probability that it is not defective?Read the answer and worked solution →The mean of the data 4, 7, 9, 10, 15 is:Read the answer and worked solution →For grouped data, the **class mark** of an interval is:Read the answer and worked solution →In the direct method, Mean = ?Read the answer and worked solution →For the step-deviation method, uᵢ is defined as:Read the answer and worked solution →The mode of the data 3, 4, 4, 5, 6, 6, 6, 7, 8 is:Read the answer and worked solution →For grouped data, the modal class is the class with the:Read the answer and worked solution →The median of the data 8, 12, 15, 17, 21, 24, 29 (n=7) is:Read the answer and worked solution →For grouped data, the median formula is l + [(n/2 − cf) / f] · h, where "cf" stands for:Read the answer and worked solution →If Mean = 28 and Mode = 24, estimate the Median using 3·Median = Mode + 2·Mean.Read the answer and worked solution →A "less-than" ogive is plotted with which values on the y-axis?Read the answer and worked solution →The x-coordinate of the point where the less-than and more-than ogives intersect equals the:Read the answer and worked solution →
Worked practice questions
The probability of getting a number greater than 6 in a single roll of a die is:
- 0
- 1
- 6
- 1/6
Show answer and solution
Correct answer: A. 0
A die shows only 1–6, so 'greater than 6' is impossible → 0.
A fair coin is tossed. What is the probability of getting a head?
- 1
- 1/3
- 0
- 1/2
Show answer and solution
Correct answer: D. 1/2
Two equally likely outcomes (H, T).
**Favourable:** H. P(H) = 1/2.
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