Aptitude Tests 4 Me

Basic Numeracy/Quantitative Aptitude

384. Out of a classroom of 6 boys and 4 girls the teacher picks a president for the student board, a vice president and a secretary. What is the probability that only girls will be elected?

 (a) 8/125 (b) 2/5 (c) 1/30 (d) 1/720

385. Two dice are rolled. What is the probability the sum will be greater than 10?

 (a) 1/9 (b) 1/12 (c) 5/36 (d) 1/6

386. Out of a box that contains 4 black and 6 white mice, three are randomly chosen. What is the probability that all three will be black?

 (a) 8/125 (b) 1/30 (c) 2/5 (d) 1/720

387. The probability of pulling a black ball out of a glass jar is 1/X. The probability of pulling a black ball out of a glass jar and breaking the jar is 1/Y. What is the probability of breaking the jar?

 (a) 1/(XY) (b) X/Y (c) Y/X (d) 1/(X+Y)

388. Danny, Doris and Dolly flipped a coin 5 times and each time the coin landed on “heads”. Dolly bet that on the sixth time the coin will land on “tails”, what is the probability that she’s right?

 (a) 1 (b) 1/2 (c) 3/4 (d) 1/4

TOTAL

Detailed Solution