1) There are two sections in a question paper each contains five questions. A student has to answer 6 questions. The maximum number of questions that can be answered from any section is 4. How many ways he can attempt the paper? a) 50 b) 100 c) 120 d) 200 Answer:Option d Possible ways in which he can attempt 6 questions are 5C4*5C2 = 50 5C3*5C3 = 100 5C2*5C4 = 50 50+100+50 = 200 2) If 5 men take an hour to dig a ditch, then how long should 12 men take a dig to the ditch of the same type? a) 25 min b) 30 min c) 28 min d) 20 min Answer:Option a M1H1 = M2H2 5*60 = 12*H2 H2 = 25 min

1) There are two sections in a question paper each contains five questions. A

student has to answer 6 questions. The maximum number of questions that can

be answered from any section is 4. How many ways he can attempt the paper?

a) 50

b) 100

c) 120

d) 200

Answer:Option d

Possible ways in which he can attempt 6 questions are

5C4*5C2 = 50

5C3*5C3 = 100

5C2*5C4 = 50

50+100+50 = 200

2) If 5 men take an hour to dig a ditch, then how long should 12 men take a dig to

the ditch of the same type?

a) 25 min

b) 30 min

c) 28 min

d) 20 min

Answer:Option a

M1H1 = M2H2

5*60 = 12*H2

H2 = 25 min