1 . If mean of y and $1\over y$ is M, then what is the mean of
$y^3$and $1\over y^3$?

a. $M(M^2-3)\over3$ , b.$M^3$ , c.$M^3$-3 , d. M( $4M^2$-3)
A.  a
B.  b
C.  c
D.  d
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2 . From a series of 50 observations, an observation with value 45 is dropped but the mean remains the same. What was the mean of 50 observations?
A.  50
B.  49
C.  45
D.  40
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3 . Read the following information carefully to answer the questions that follow.

The average age of 6 persons living in a house is 23.5 years. Three of them are majors and their average age is 42 years. The difference in ages of the three minor children is same

What is the mean of the ages of minor children?
A.  3 years
B.  4 years
C.  5 years
D.  6 years
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4 . Read the following information carefully to answer the questions that follow.
The average age of 6 persons living in a house is 23.5 years. Three of them are majors and their average age is 42 years. The difference in ages of the three minor children is same
What is the median of the ages of minor children?
A.  3 year
B.  5 years
C.  7 years
D.  Cannot be determined
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5 . In how many ways can a committee of 4 people be chosen out of 8 people ?
A.  110
B.  32
C.  70
D.  126
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6 .
A.  41 : 44
B.  55 : 53
C.  31 : 35
D.  44 : 41
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7 .
A.  95
B.  98
C.  90
D.  85
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8 .
A.  1284
B.  1134
C.  1054
D.  1164
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9 .
A.  42
B.  28
C.  15
D.  35
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10 .
A.  11 : 5
B.  3 : 2
C.  5 : 11
D.  2 : 3
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