Quantitative Reasoning Probability Test 1 Online

1. In a class of 125 students 70 passed in Mathematics, 55 in Statistics and 30 in both. The probability that a student selected at random from the class, has passed in only one subject is?

2. A class consists of 100 students, 25 of them are girls and 75 boys; 20 of them are rich and remaining poor; 40 of them are fair complexioned. The probability of selecting a fair complexioned rich girl is?

3. An article manufactured by a company consists of two parts A and B. In the process of manufacture of part A,9 or of 10 are likely to be defective. Similarly 5 out of 100 are likely to be defective in the manufacture of part B. The probability that the assembled part will not be defective, is?

4. A bag contains 3 while balls and 2 black balls. Another bag contains 2 white balls and 4 black balls. A bag and a ball are picked at random. The probability that the ball will be white is?

5. Two dice are tossed. The probability that the total score is a prime number is?

6. A bag contains 5 red ball and 8 blue balls. If also contains 4 green and 7 black balls. If a ball is drawn at random, then find the probability that it is not green.

7. A sum of money is rounded off to the nearest rupee. The probability that the round off error is at least 10 passe is?

8. If the probability that A will live 15 years is 7/8 and that B will live 15 years is 9/10, then what is the probability that both will live after 15 years?

9. The probability that a certain electronics component fails when first used is 0.10. If it does not fail immediately, the probability that it lasts for one year is 0.99. The probability that a new competent well last for one year is?

10. A box contains 5 brown and 4 white socks. A man takes out two socks. The probability that they are of the same color is?

11. The probability of raining on day 1 is 0.2 and on day 2 is 0.3. What is the probability of raining on both the days?

12. In his wardrobe, Timothy has 3 trousers. One of them is black, the second blue, and the third brown. In his wardrobe, he also has 4 shirts. One of them is black and the other 3 are white. He opens his wardrobe in the dark and picks out one shirt-trouser pair, without examining the color. What is the likelihood that neither the shirt nor the trouser is black?