Directions (next three questions) : Study the following information to answer the given questions.
A bucket contains 8 red, 3 blue and 5 green marbles.
If 2 marbles are drawn at random, what is the probability that both are green ?
n(S) = 16C2 = 16×15/1×2 = 120
n(E) = 5C2 = 5×4/1×2 = 10
Required probability= 10/120 =1/12
If 4 marbles are drawn at random, what is the probability that 2 are red and 2 are blue ?
Samir’s age is one-fourth of his father’s age and two-third of his sister Reema’s age. What is the ratio of the ages of Samir. Reema and their father respectively ?
A alone can make 100 baskets in 6 days and B alone can make 100 baskets in 12 days. In how many days can A and B together make 100 baskets ?
Sarita started a boutique inversing an amount of INR 50,000/- Six months later Neeta joined her with an amount of INR 80,000/-. At the end of one year they earned a profit of INR 18.,000/-. What is Sarita’s share in the profit ?
Three girls start jogging from the same point around a circular track and each one completes one round in 24 sec, 36 sec and 48 sec respectively. After how much time will they meet at one point