1 .

In how many ways can 5 boys and 4 girls be seated in a row.so that they are at alternate places.

A.  144
B.  1440
C.  2880
D.  288
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2 .

A bag contains 4 blue, 5 green and 6 red balls. 3 balls are drawn randomly. What is the probability that balls drawn contain exactly 2 green balls ?

A.  20/91
B.  16/91
C.  60/91
D.  15/91
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3 .

A man can row a boat 10 km/hr in still water. When the speed of the stream is 4 km/hr, it takes 30 hours to row to a certain place and come back. How far is the place ?

A.  160 km
B.  153 km
C.  126km
D.  172 km
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4 .

Two trains start at the same time from Delhi and Pune and proceed towards each other at the rate of 80 km/h"1 and 90 km/h"1 respectively. When they meet, it is found that one train has travelled 200 km more than the other. Find the distance between Delhi and Pune.

A.  3200 km
B.  3400 km
C.  3600 km
D.  3800km
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5 .

It takes 20 hours for a man to complete a journey by a car. If he drives the first half at the speed 60 kmh"1 and the second half at 40 kmh', what is the total distance ?

A.  720 km
B.  820 km
C.  860 km
D.  960 km
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6 .

A certain number of men can do a work in 20 days. If there were 4 more men, they. would finish it in 4 days less. How many men are there ?

A.  12 men
B.  14 men
C.  16 men
D.  18 men