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
- 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.
A.59.9 B. 60.1 C.62 D.69.5 E.70.1
- The difference between the mean and the median of the numbers 8,10,12,15,5,9 is
A.0 B.0.5 C. 1 D. 1.5 E. 2 - Given data 2,3,4,4,4,5,5,6,7,13 . Which of the following is (are) true?
1.The mean is equal to the median.- The mode is smaller than the mean.
- The mode is greater than the median.
A.one only B. 2 only C.3 only D. 1 and 2 only E.2 and 3 only
19.If the mode of even numbers 2,4,4,3,7,5,y,5,4,3,5 is 5. Find the mean of the set of number.
A. 3 B. 3.5 C.4 D.4.5 E.5
20.A group of n numbers has mean m if the number 1,2 and 9 are removed from group , the
mean of remain n-3 number remains unchanged . Find m.
A.1 B.2 C. 3 D.4 E.n-3
21.A two figure number is written down at random, the probability that the number is greater
than 67 is
A. 3299 B.3290 C.3399 D.3390 E. None of them
- The probability that a number chosen from 2,4,5,6,6,7,8,9 will be the median is
A.12 B.13 C.14 D.0 E.18 - A dice is rolled , the probability that it is not greater than 3 is
A.16 B.26 C.36 D.46 E.56 - A bag contains 5 white marbles, 3 black and 2 red. The probability that if a marble is chosen
at random it will be a not white is
A. 35 B.25 C.310 D.210 E.12 - A bag contain 12 white balls , some red balls and some blue balls. The probability of
drawing a red ball is 12 and the probability of drawing a blue ball is 13 . The total number
of balls in the bag is
A. 22 B.60 C. 72 D.84 E. impossible to determine from the given information - A bag contains x red balls and 2 blues. A ball is chosen at random, given that the
probability that it will be red is 23 , then x=………
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