0
Q:

n is an integer chosen at random from the set

{5, 7, 9, 11 }

p is chosen at random from the set

{2, 6, 10, 14, 18}

What is the probability that n + p = 23 ?

A) 0.1 B) 0.2
C) 0.25 D) 0.3

Answer:   A) 0.1



Explanation:

Each of the integers in the first set could be combined with any from the second set, giving a total of 4 x 5 = 20 possible pairs.

Of these the combinations that could give a sum of 23 are (5 + 18), and (9 + 14)

This means that the probability of getting a sum of 23 is 2/20 = 1/10

Q:

A car takes 5 hours to cover 100 kms distance at a particular speed whereas another car takes 3 hours to reach a particular distance at the same speed. Find the distance.

A) 40 km B) 60 km
C) 70 km D) 80 km
 
Answer & Explanation Answer: B) 60 km

Explanation:
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0 463
Q:

Which of the following ratios can be the ratio of the sides of a right angled triangle?

A) 9:6:3 B) 13:12:5
C) 7:6:5 D) 5:3:2
 
Answer & Explanation Answer: B) 13:12:5

Explanation:
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0 540
Q:

To cover a certain distance with a speed of 60 km/hr, a train takes 15 hours. If it covers the same distance in 12 hours, what will be its speed?

A) 65 km/h B) 70 km/h
C) 75 km/h D) 80 km/h
 
Answer & Explanation Answer: C) 75 km/h

Explanation:
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0 546
Q:

If a triangle has its orthocenter and centroid of equal length, then which of the following is TRUE about the triangle?

A) Right angled B) Equilateral
C) Scalene D) Obtuse angled
 
Answer & Explanation Answer: B) Equilateral

Explanation:
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0 664
Q:

From a point on a bridge across the river, the angles of depression of the banks on opposite sides of the river are 30° and 45° respectively. If the bridge is at a height of 2.5m from the banks, then the width of the river is (take √3 = 1.732)

A) 5.83m B) 6.83m
C) 5.76m D) 6.87m
 
Answer & Explanation Answer: B) 6.83m

Explanation:
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0 631
Q:

ΔABC is right angled at B. BD is an altitude. AD = 3 cm and DC = 9 cm. What is the value of AB (in cm)?

A) 6 B) 5
C) 4.5 D) 5.5
 
Answer & Explanation Answer: A) 6

Explanation:
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0 520
Q:

Find the odd word/letters/number from the given alternatives.

(A) BCE (B) WXZ (C) MNP (D) GHK

A) A B) B
C) C D) D
 
Answer & Explanation Answer: D) D

Explanation:
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0 4661
Q:

4*(-­0.1(5.5 + 8.5)) of 0.5 = ?

A) -2.8 B) -1.68
C) -1.28 D) -0.84
 
Answer & Explanation Answer: A) -2.8

Explanation:
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0 615