Quantitative Reasoning Probability Test 1 Online

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

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

3. 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?

4. 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?

5. 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?

6. 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?

7. 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?

8. 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?

9. 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?

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 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?

12. 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.