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.

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.

A.(i) positive
  (ii) negative
 (iii) negative
 (iv) negative
 

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



 

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.