In this question, we have to find the distance covered by Rahim, after Ram has finished the race
i.e. distance covered by Rahim in (35 – 28 = 7s).
Distance = 100/35 × 7 = 20 m
Ram beats Rahim by 20 m.
Out of 24 persons, the first person will shake hand with 23 persons.
The second person will shake hand with 22 persons (because he has already shaken hand with first person).
The third person will shake hand with 21 persons and so on. The second last person shakes hand with only one person. And last will shake hand with none
(because he has already shaken hand with all persons).
In order to find the total number of handshakes you have to add all the natural numbers from 1 to 23 i.e. ∑ 23.
∑23 = 23 x 24/2 = 276 = 276 handshakes.
In a bag there are 10 red and 15 blue marbles. Two marbles are drawn in succession without replacement. What is the probability that first is red and second is blue
One year ago, Smitha was four times as old as her daughter Pallavi. Six years hence, Smitha’s age will exceed her daughter’s age by 9 years. The ratio of the present ages of Smith and her daughter is:
There are two buildings P and Q. If 75 persons are sent from P to Q, then the number of persons in each building is the same. If 25 persons are sent from Q to P, then the number of persons in P is double the number of persons in Q. How many persons are there in building P?