9MathQ7001.R

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

1. 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
2. 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
3. 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
4. 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.

A.59.9 B. 60.1 C.62 D.69.5 E.70.1

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
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.
   1. The mode is smaller than the mean.
   2. 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
3. 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
4. A dice is rolled , the probability that it is not greater than 3 is
   A.16 B.26 C.36 D.46 E.56
5. 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
6. 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
7. 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=………