Ibps Po Exam Template With Answers Page 26
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32IBPS PO Pre 2016 – Model Paper 4
⇒ x = 16
27)
Option 3
Let SP = x, CP = y
⇒2x-y = 3(x-y)
⇒2x-y = 3x-3y
⇒ 2y = x
It proves that SP is double of CP, which means profit percentage is 100%.
28)
Option 3
CP per toffee = 1/6 and SP per toffee = 1/6 * 1.2 = 1/5
So answer is 5
29) Option 1
Here, S = [1, 2, 3, 4, …., 19, 20]
Let E = event of getting a multiple of 3 = [3, 6, 9, 12, 15, 18]
P (E) = n (E) / n (S) = 6 / 20 = 3 / 10
30) Option 1
P (E) = 30 / 100 = 3 / 10 , P (H) = 20 / 100 = 1 / 5 and P (E ∩ H) = 10 / 100 = 1 / 10
P (E or H) = P (E U H)
= P (E) + P (H) - P (E ∩ H)
= (3 / 10) + (1 / 5) - (1 / 10) = 4 / 10 = 2 / 5
31) Option 1
Let S be the sample space. Then,
n(S) = Number of ways of drawing 3 balls out of 10 = 10C3 =(10 × 9 × 8) / (3 × 2 × 1)
= 120
Let E = event of drawing 1 red and 2 white balls
Page 26
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