Class 10 Maths MCQs on Complementary Events and Experimental Probability
Class 10 Maths MCQs on Complementary Events & Experimental Probability
Class: 10 | Subject: Mathematics
Chapter 14: Probability
Board: CBSE Board Examination (Strictly Based on Latest NCERT Curriculum)
1. If P(E) = 0.35, then P(E') =
Correct Answer: B
Explanation: P(E) + P(E') = 1. So, P(E') = 1 − 0.35 = 0.65.
Explanation: P(E) + P(E') = 1. So, P(E') = 1 − 0.35 = 0.65.
2. The probability of complementary events always sums to:
Correct Answer: B
Explanation: By definition, P(E) + P(E') = 1.
Explanation: By definition, P(E) + P(E') = 1.
3. Experimental probability is based on:
Correct Answer: B
Explanation: It is calculated from observed outcomes in experiments.
Explanation: It is calculated from observed outcomes in experiments.
4. If a coin is tossed 100 times and head appears 60 times, experimental probability of head is:
Correct Answer: A
Explanation: Experimental Probability = 60/100 = 0.6.
Explanation: Experimental Probability = 60/100 = 0.6.
5. If P(E) = 1, then P(E') =
Correct: B
Explanation: Complement of sure event is impossible.
Explanation: Complement of sure event is impossible.
6. If an event is impossible, its experimental probability is:
Correct: B
Explanation: Impossible event never occurs.
Explanation: Impossible event never occurs.
7. Experimental probability formula is:
Correct: A
Explanation: Based on observed data.
Explanation: Based on observed data.
8. If 200 bulbs tested, 10 defective. Experimental probability of defect:
Correct: A
Explanation: 10/200 = 0.05.
Explanation: 10/200 = 0.05.
9. Complement of impossible event:
Correct:A
Explanation: 1 − 0 = 1.
Explanation: 1 − 0 = 1.
10. Experimental probability approaches theoretical probability when:
Correct:A
Explanation: Law of large numbers concept.
Explanation: Law of large numbers concept.
11. If P(E)=0.25, P(E')=
Correct:A
Explanation: 1 − 0.25.
Explanation: 1 − 0.25.
12. Complementary events are:
Correct:A
Explanation: Together they cover whole sample space.
Explanation: Together they cover whole sample space.
13. If 500 trials, event occurred 125 times, probability:
Correct:A
Explanation: 125/500=0.25.
Explanation: 125/500=0.25.
14. Sum of experimental probabilities of complementary events:
Correct:A
Explanation: Always 1.
Explanation: Always 1.
15. Probability of not getting six on die:
Correct:A
Explanation: 1 − 1/6.
Explanation: 1 − 1/6.
16. Complement of E denoted by:
Correct:A
Explanation: Standard notation.
Explanation: Standard notation.
17. If experimental probability 0.8, complement:
Correct:A
Explanation: 1 − 0.8.
Explanation: 1 − 0.8.
18. Experimental probability may vary because:
Correct:A
Explanation: Based on actual trials.
Explanation: Based on actual trials.
19. Complementary events cannot occur:
Correct:A
Explanation: They are mutually exclusive.
Explanation: They are mutually exclusive.
20. Experimental probability range:
Correct:A
Explanation: Same as theoretical probability.
Explanation: Same as theoretical probability.
