# Q. The weekly pocket expenses (in Rupees) of 30 students of a class are given below: 62, 80, 110, 75, 84, 73, 60, 62, 100, 87, 78, 94, 117, 86, 65, 68, 90, 80, 118, 72, 95, 72, 103, 96, 64,94, 87, 85, 105, 115.

Expenses
(in Rupees)
60 - 70 70 - 80 80 - 90 90 - 100 100 - 110 110 - 120 Frequency 6 5 7 5 3 4
A.
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Q. What will be the sign of the product if we multiply together:
(i) 8 negative and 4 positive integers.
(ii) 3 negative and 10 positive integers.
(iii) 9 negative and 5 positive integers.
(iv) 1 negative and 2 positive integers.
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A.(i) positive
(ii) negative
(iii) negative
(iv) negative

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Q.    A ________________contains only numeric constants and operations like addition (+), subtraction      (–), multiplication (×) and division (÷).
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1.  numerical expression
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Q.    Write two ways of each algebraic expression in words.
1. P + 7
2. R – 9
3. A x 10
4. N ÷ 15
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A. 1.(a)the sum of P and 7
(b) P increased by 7
2. (a) 9 is less than R
(b) the difference of R and 9
3. (a) 10 times A
(b) the product of 10 and A

4. (a) N divided by 15
(b) the quotient of N and 15

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4.The weekly pocket expenses (in dollars) of 30 students of a class are
given below:
62, 80, 110, 75, 84, 73, 60, 62, 100, 87, 78, 94, 117, 86, 65, 68, 90, 80, 118,
72, 95, 72, 103, 96, 64, 94, 87, 85, 105, 115.
a. Construct a frequency table with class intervals 51-60,61-70 ,71-80, 81-90
etc.
b. Draw a histogram and frequency polygon.
c. Calculate mode, Range and median.

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positive
negetive
negetive
negetive
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