Competitve

Current Affairs & GK General Aptitude General Knowledge General Knowledge & Current Affairs Major Competitive Exams Quantitative Aptitude & Reasoning Verbal and Reasoning

Q. A bag contains 5 red balls and 3 blue balls. What is the probability of picking a red ball?

Solution

Probability = Number of favorable outcomes / Total outcomes = 5 / (5 + 3) = 5/8.

Correct Answer: B — 5/8

Q. A box contains 3 red, 5 blue, and 2 green balls. What is the probability of picking a blue ball?

Solution

Total balls = 3 + 5 + 2 = 10. Probability of blue = 5/10 = 1/2.

Correct Answer: B — 1/5

Q. A sum of money doubles itself in 5 years at simple interest. What will it become in 15 years?

Solution

In 5 years, it doubles. In 15 years (3 times 5 years), it will be 2 × 3 = 6 times the original amount.

Correct Answer: B — 4 times

Q. If 3x - 7 = 2x + 5, what is the value of x?

Solution

3x - 2x = 5 + 7 => x = 12.

Correct Answer: A — 5

Q. If 7 workers can complete a task in 14 days, how many days will it take for 14 workers to complete the same task?

Solution

Work done = Workers × Days. 7 workers × 14 days = 98 worker-days. 14 workers will take 98/14 = 7 days.

Correct Answer: A — 7 days

Q. If a car covers 150 km in 2 hours, what is its speed in km/h?

Solution

Speed = Distance/Time = 150 km / 2 h = 75 km/h.

Correct Answer: C — 75 km/h

Q. If a person can complete a task in 12 hours, how much of the task can they complete in 3 hours?

Solution

In 3 hours, they complete 3/12 = 1/4 of the task.

Correct Answer: A — 1/4

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