Total Number of candidates = 20 Let ‘S’ be the Sample Space Then, n(S) = number of ways of three candidates who got selected n(S) = 20C3 = 1140 Let ‘E’ be the event of 1 girl and 2 boys selected Therefore, n(E) = number of possibility of 1 girl out of 6 and 2 boys out of 14 n(E) = 6C1 × 14C2 = 546 Now the required Probability = (n(E))/(n(S)) = 546/1140 = 91/190
The sum of the present ages of two cousins is 54 years. Eleven years ago, the older one was thrice as old as the younger one. What is the present age of...
A’s age is 120% of what he was 5 years ago, But 40% of what it will be after 5 years. What is his present age?
Nine years ago, the ratio of ages of Asha and Usha was 2:3, respectively. Seven years hence, the ratio of ages of Vimal and Usha will be 5:6, respective...
18 years ago the average age of a family of four members was 45 years. Two children were born in that span of 18 years. The present average age of the f...
Today is Reena’s birthday. She has turned 34. Reena is twice as old as Deepa was when Reena was as old as Deepa is now. How old is Deepa now?
The average age of three ladies is 30 years and their ages are in the ratio of 4: 6: 8. The age of the youngest lady is:
Currently, Person 'A' is 42 years old. Person 'B' is 6 years younger than 'A'. Three years ago, the age of 'C' was 25% less than what 'B' is right now. ...
The current average age of three friends, Aravi, Bipasa, and Chinu, is 24 years. The ratio of Chinu's and Diksha's present ages is 4:5, and Bipasa's cur...
Five years ago from now, the ages of 'A' and 'B' were in the ratio 31:17, respectively. Fifteen years ago from now, the ages of 'A' and 'B' were in the ...
Neha was married 5 years ago. In his present age 8/7 times of his age at the time of her marriage. Her son’s age is 1/8 times of her present age, ...
