TCS Company Numerical Ability Probability

lottery balls are numbered and colored balls. in the famous lotto, six numbered balls are drawn at random from 49 balls. In each ticket one needs to guess the six numbers that would be drawn.
an urn contains m white and n black balls. a ball is drawn at random and is put back in to the urn along with k additional balls of the same color as that of the ball drawn. A ball is again drawn at random. probability of drawing a white ball now:
1) does not depend on k
2) cant be determined
3) decreases with k
4) increases with k

Read Solution (Total 18)

TCS Other Question

A man goes upstream for a distance of 10 km in 5 hrs. Another man goes downstream the same distance of 10 km in 3 hrs. what is the difference in speed of 2 men if the river speed is 0.5 kmph?
1) 1.56
2) 2.45
3) 2.3
4) 1.33
f(x)=1+x+x^2+....+x^6.
the remainder when f(x^7) is divided by f(x):
1)none
2)6
3)0
4) 7