Question
In a row, A is 12th from the front and there
are 5 boys between A and B, then find total number of boys if B is 9th from theback and total number of boys is not more than 18?Solution
A’s position from the front = 12 Number of boys between A and B = 5 ∴ B’s position from the front = 6 Position of B from the back = 9 Total number of boys =  (9 + 6) – 1 = 15 – 1 = 14 Hence, 14 boys are in the row.
- In how many ways can the letters of the word "CHOCOLATE" be arranged, and what is the probability that all the vowels in these arrangements always appear t...
- There are five Rs. 1 coins, four Rs. 2 coins, and fifteen Rs. 5 coins in a pouch. One coin is lost. Find the probability that the lost coin is not a Rs. 1 ...
- A bag contains 4 black balls, 6 white balls and 5 red balls. Two balls are drawn simultaneously. Find the probability that both the balls are of same c... 
- 34 pens are there in a box where 10 are red pens, ‘p’ are blue pens and remaining are black pens. If a pen is picked, the probability of getting blu... 
- If the letters of the word HORIZON be arranged at random, what is the probability that all the vowels are together? 
- Out of three girls and five boys, five children are to be randomly selected for a dance programme. What is the probability that all the selected childre... 
- 40 pens are there in a box where 22 are red pens, ‘p’ are blue pens and remaining are black pens. If a pen is picked, the probability of getting blu... 
- In a box there are 3 red, 6 blue, and 9 yellow cards. One card is picked up randomly. What is the probability that it is neither red nor yellow? 
- A bag contains 8 green balls, 5 yellow balls and 3 blue balls. Two balls are drawn simultaneously. Find the probability that both the balls are of same ... 
- A box contains Z black balls and 7 white balls. If two balls are drawn at random, one after another without replacement, and the ...