If three socks are chosen at random, what is the probability that all are blue socks?
Probability = ³C₃ / ¹⁰C₃ = 1/120
Anil’s present age is 3/8 of his father’s present age. Anil’s sister is 4 years older than him. The ratio between the present age of Anil’s fath...
Reena is twice as old as Sunita .Three years ago, she was three times as old as Sunita. How old is Reena now?
Twelve years hence, the ratio between the ages of C and E is 5:7 respectively. The present age of A is 25% less than that of D. Four years ago, the aver...
Present age of ‘A’ is 40% more than that of ‘B’. If 11 years hence from now, ‘B’ will be 5 years younger than ‘A’, then find the sum of ...
At present Meena is eight times her daughter’s age. Eight years from now, the ratio of the ages of Meena and her daughter will be 9 : 2 respective...
The ratio of the present age of A to that of B is 7:9. Six years ago the ratio of 1/3 of A’s age at that time and 1/3 of B’s age at that time was 1:...
In a classroom there are 13 boys and 11 girls. Average age of each boy and each girl is 23 years and 17 years respectively. The sum of ages of all the b...
‘A’ is 4 years younger than ‘B’ and 6 years elder than ‘C’. If the present age of ‘B’ and ‘D’ is 28 years and 20 years, respectively...
The average age of the husband, wife and their child 4 years ago was 24 years and that of the husband and the child 5 years ago was 19 years. The prese...
The average age of Mohan, his wife, his son and his daughter is 24 years. His wife is just 5 years younger than Mohan himself and his wife was 25 years ...
