TCS Company Numerical Ability Probability

A bag contains 6 balls of one or more colours. A ball is picked and is found to be red. What is the probability that the bag initially had exactly 6 red balls?
option
a) 2/7
b) 1/5
c) 3/5
d) 4/5

Read Solution (Total 4)

TCS Other Question

There are 4 boys and 5 girls in two separate queues. The two queues are merged so that the positions of the boys (in relation to each other) and those of the girls (in relation to each other) remain unchanged. In how many ways can this be done?
option
a) 5!4!
b) 9P5
c) 9C5
d) (9C5 )^2
Ashok went to a bank to draw money. When his token number was called out, he asked the teller to give him 'x' hundred-rupee notes and y thousand-rupee notes. The teller made a mistake and gave Ashok x thousand-rupee notes and y hundred-rupee notes. Ashok took the money without verifying it and walked home. On the way, he bought groceries worth Rs.500. After the purchase, he realized the teller's mistake and noticed that he had exactly half the amount he should have received. Which of the following may be true about the amount on the cheque?
a)It lies between 10000 and 11000
b)It lies between 11000 and 12000
c)It lies between 12000 and 13000
d)It lies between 13000 and 14000