11
Q:

# A bag contains 12 white and 18 black balls. Two balls are drawn in succession without replacement. What is the probability that first is white and second is black?

 A) 6/145 B) 36/145 C) 18/95 D) 12/145

Explanation:
 The probability that first ball is white: =C112C130=1230=25 Since, the ball is not replaced; hence the number of balls left in bag is 29. Hence the probability the second ball is black:=C118C129=1829 Required probability =(25)×(1829) =36/145
Q:

If sqrt x + frac{1}{sqrt x} = 2sqrt2, then x^2 + frac{1}{x^2} is equal to:

 A) 36 B) 34 C) 32 D) 64

Explanation:

1 13
Q:

If 'J' is coded as '20' and 'BAT” is coded as '46' then how will 'CRICKET' be coded?

 A) 138 B) 158 C) 142 D) 140

Explanation:

1 117
Q:

What is the value of x so that the seven digit number 8439x53 is divisible by 99?

 A) 9 B) 4 C) 3 D) 6

Explanation:

0 340
Q:

△ABC ∼ △NLM and ar(△ABC): ar(△NLM) = 4 : 9. If AB = 6 cm, BC = 8 cm and AC =12 cm, then ML is equal to:

 A) 18 cm B) 9 cm C) 6 cm D) 12 cm

Explanation:

0 366
Q:

If (5a - 3b) : (4a - 2b) = 2 : 3, then a : b is equal to:

 A) 3 : 4 B) 2 : 3 C) 5 : 8 D) 5 : 7

Explanation:

1 261
Q:

What is the value of x so that the seven digit number 55350x2 is divisible by 72?

 A) 1 B) 8 C) 7 D) 3

Explanation:

0 382
Q:

Walking frac{5}{7} of his usual speed, a person reaches his office 10 minutes later than the usual time. His usual time in minutes is:

 A) 28 B) 30 C) 25 D) 35

Explanation:

0 43
Q:

If a + b + c = 8 and ab + bc + ca = 20, then a^3 + b^3 + c^3 - 3abc is equal to:

 A) 30 B) 24 C) 32 D) 36