- Which of the following is (are) true?
- The class limits of the interval are 34 and 38.
- The midpoint of the interval is 35.
- 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
- 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 - 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 - 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 - 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
- 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.
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