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Question 1
If 
and 17.5 is the mode of the following frequency distribution.
and 17.5 is the mode of the following frequency distribution.
Then, 
Question 2
The median class in the following frequency distribution is
Question 3
Alloy A contain 70% copper and rest is tin. Alloy B contain 84% copper, 10% tin & rest are impurities. In which ratio both alloys are mixed so that in new mixture % of tin will be 20% ?
Question 4
In a class of 100 students, the average weight is 30 kg. If the average weight of the girls is 24 kg and that of the boys is 32 kg, then what is the number of girls in the class?
Question 5
A's salary is 30% of B's salary and B's salary is 25% of C's salary. What percentage of C's salary is A's salary?
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Apr 7CDS & Defence
