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1.
Three numbers, whose sum is 12, are in AP. If 1, 2 and 6 are added to them, the
resulting numbers are in GP. Find the numbers
2.
Average rainfall on a city from Monday to Saturday is 0.3 inch. Due to heavy
rainfall on Sunday, the average rainfall for the week increased to 0.5 inch.
What was the rainfall on Sunday?
3.
Calculate median from the following data
|
Marks
|
10-25
|
25-40
|
40-55
|
50-70
|
70-85
|
85-100
|
|
Frequency
|
6
|
20
|
44
|
26
|
3
|
1
|
4.
Given the following results of the height and weight of 1000 students. The mean
height is 170 cm, the mean weight is 75 kg. The standard deviation of the
height and weight are 6 cm and 6 kg respectively r = 0.6. amit weighs 50 kg,
sumeet is 1.5 m tall. Estimate the height of Amit from his weight and the
weight of sumeet from his height
5.
In a sample of 500 people from a village in Rajasthan, 280 are found to be rice
eaters and rest wheat eaters. Can we assume that both the food articles are
equally popular?
6.
In a binomial distribution 31% of the items are under 45 and 8% are over 64.
Find the mean and variance of the distribution
7.
In a large number of group of children 55% are under 60 cm heightynd 40% are
between 60 and 65 cm. Assuming a normal distribution, find the mean and SD of
height
8.
Construct index number form the data by applying Marshall edgeworthmethod
|
Commodity
|
Price 2004
|
Quantity
|
Price 2006
|
Quantity
|
|
A
|
2
|
8
|
4
|
6
|
|
B
|
5
|
10
|
6
|
5
|
|
C
|
4
|
14
|
5
|
10
|
|
D
|
2
|
19
|
2
|
13
|
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