G8 his9003

1. Which of the following is (are) true?
   1. The class limits of the interval are 34 and 38.
   2. The midpoint of the interval is 35.
   3. The lower class boundary is 33.5.
      A. 1 only B. 2 only C. 3 only D. 1 and 2 only E.1 and 3 only
2. The mean of the numbers a1,a2,a3,……..,a7 is 20, then the mean of the numbers
   a1+2, a2+4,a3+6,………,a7+14 is
   A. 19 B.20.9 C. 24 D. 20 E.28
3. The product of the median and the mode of the numbers 1,4,4,4,5,5,9,16 is
   A. 96 B.30 C.24 D. 20 E.18
   12.Seven values 3,3,3,4,5,8 and x . If the mean of these seven values is equal to twice their
   mode , then x=………
   13.The mean of the numbers log2,log32 ,log43 ,….,log10099 is
   A.log5049 B.log5150 C. 0.01 D.0.02 E.299
4. The mean of 3,7,x,11-x, x-1 is 5, then the value of x is
   A.3 B.4 C. 5 D. 5.5 E.7.5
5. If the average of three numbers a,b,c is x , then the average of a+3, b-1, c-5 is
   A. x B. x+1 C.x-1 D. 3x-1 E.x+2

1. The table show the mean marks of two classes of student in a Maths test.
   Number of student 36 44
   Mean mark 70 52

Find the mean mark of two classes.