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Question (21)

QN009918

A student tosses a coin 20 times and gets heads 9 times. What is the experimental probability of getting heads?

(A) 9/20
(B) 11/20
(C) 1/2
(D) 9/11

Correct Answer: A

Explanation:

Experimental probability = 9/20.

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Question (22)

QN009919

Theoretical probability is based on:

(A) Guesswork only
(B) Experimental data only
(C) Equally likely outcomes
(D) Past memories of outcomes

Correct Answer: C

Explanation:

Theoretical probability assumes all outcomes are equally likely.

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Question (23)

QN009920

If the probability of an event is 1, the event is called:

(A) Random
(B) Impossible
(C) Certain
(D) Unlikely

Correct Answer: C

Explanation:

Probability 1 represents certainty.

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Question (24)

QN009921

A die is rolled once. What is the probability of getting a prime number?

(A) 1/6
(B) 1/3
(C) 1/2
(D) 2/3

Correct Answer: C

Explanation:

Prime numbers on a die are 2, 3 and 5. Probability = 3/6 = 1/2.

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Question (25)

QN009922

A random sample of 50 sweets contains 15 orange sweets. If the shop has 500 sweets in total, approximately how many orange sweets are expected?

(A) 100
(B) 150
(C) 200
(D) 250

Correct Answer: B

Explanation:

Orange sweets expected = (15/50) × 500 = 150.

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Question (26)

QN009923

Which of the following best explains why coin tossing is considered fair in cricket matches?

(A) The coin always gives heads
(B) Both teams have equal chance
(C) The captain chooses the result
(D) Toss results can be predicted

Correct Answer: B

Explanation:

A fair coin gives equal opportunity to both teams.

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Question (27)

QN009924

A letter is selected randomly from the word “SCIENCE”. What is the probability of selecting the letter E?

(A) 1/7
(B) 2/7
(C) 3/7
(D) 1/2

Correct Answer: B

Explanation:

The word SCIENCE has 7 letters with 2 Es.

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Question (28)

QN009925

Which of the following probabilities is closest to “more likely”?

(A) 0
(B) 0.2
(C) 0.5
(D) 0.8

Correct Answer: D

Explanation:

A probability near 1 indicates more likely events.

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Question (29)

QN009926

Two coins are tossed simultaneously. What is the probability of getting exactly one head?

(A) 1/4
(B) 1/2
(C) 3/4
(D) 1

Correct Answer: B

Explanation:

Favourable outcomes are HT and TH out of 4 outcomes.

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Question (30)

QN009927

A weather report says there is a 75% chance of rain tomorrow. This means:

(A) Rain is impossible
(B) Rain is equally likely and unlikely
(C) Rain is more likely to occur
(D) Rain is certain

Correct Answer: C

Explanation:

A 75% chance means rain is more likely than not to occur.

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Question (21)

A student tosses a coin 20 times and gets heads 9 times. What is the experimental probability of getting heads?

Explanation:

Link:

Question (22)

Theoretical probability is based on:

Explanation:

Link:

Question (23)

If the probability of an event is 1, the event is called:

Explanation:

Link:

Question (24)

A die is rolled once. What is the probability of getting a prime number?

Explanation:

Link:

Question (25)

A random sample of 50 sweets contains 15 orange sweets. If the shop has 500 sweets in total, approximately how many orange sweets are expected?

Explanation:

Link:

Question (26)

Which of the following best explains why coin tossing is considered fair in cricket matches?

Explanation:

Link:

Question (27)

A letter is selected randomly from the word “SCIENCE”. What is the probability of selecting the letter E?

Explanation:

Link:

Question (28)

Which of the following probabilities is closest to “more likely”?

Explanation:

Link:

Question (29)

Two coins are tossed simultaneously. What is the probability of getting exactly one head?

Explanation:

Link:

Question (30)

A weather report says there is a 75% chance of rain tomorrow. This means:

Explanation:

Link:

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