Direction Q. (1-5) In each of the following number series, a wrong number is given. Find out the wrong number.
1.In a class there are 5 girls and 7 boys. In how many ways can 5 students be chosen such that every time there is exactly one girl? (1)
1.175
2.224
3.256
4.63
5.None
2.A bag contains 7 white, 6 red and 8 green balls. 2 balls are drawn from the box at random. What is the probability that both balls are of the same colour? (2)
1.19∕66
2.32∕105
3.41∕411
4.5∕126
5.None
3.A person lent a certain sum of money at 5% simple interest and in 10 years the interest amounted to Rs 450 less than the sum lent. What is the sum? (3)
1.Rs l200
2.Rs l080
3.Rs 900
4.Rs 1640
5.None
4.If the difference between compound interest and simple interest on a certain sum of money for 3 years at 10% per annum is Rs. 155, what is the sum? (1)
1.Rs5000
2.Rs5400
3.Rs5300
4.Rs5100
5.None
5.What is the number which when multiplied by 7 is increased by 2490? (4)
1.75
2.255
3.305
4.415
5.None
