Probability » Exercise - 120. 3 dice are thrown simultaneously. What is the probability of obtaining a total of 17 or 18 ? (a) 1/9 (b) 1/72 (c) 1/54 (d) none of these
Probability » Exercise - 128. A pair of fair dice is rolled together till a sum of either 5 or 7 is obtained. Then the probability that 5 comes before 7 is : (a) 1/5 (b) 2/5 (c) 4/5 (d) none of these
Probability » Exercise - 14. The probability of obtaining an even prime number on each die, when a pair of dice is rolled is : (a) 0 (b) 1/3 (c) 1/12 (d) 1/36
Probability » Exercise - 15. 6 coins are tossed simultaneously . The probability of getting atleast 6 heads is : (a) 57/64 (b) 229/256 (c) 7/64 (d) 37/256
Probability » Exercise - 122. A coin is tossed until a head appears or until the coin has been tossed five times. If a head does not occur on the first two tosses, then the probability that the coin will be tossed 5 times is : (a) 1/2 (b) 3/5 (c) 1/4 (d) 1/3