## Saturday, September 15, 2012

### X Maths Mean median mode and Ogive(Statics)

Q.1. find the mean of the following frequency distribution: -
Ans. 25.2 (2)
 Class 0-10 10-20 20-30 30-40 40-50 Frequency 8 12 10 11 9
aQ.2. find the mode of the following data. Ans.52 (2)
 Class 0-20 20-40 40-60 60-80 Frequency 15 6 18 10
Q.3. the mean of the following frequency distribution is 50. Find the value of P.
Ans.P=52 (3)
 Class 0-20 20-40 40-60 60-80 80-100 Frequency 17 28 32 P 19
Q.4. compute the median. Ans. 46.5 (3)
 Weight in (kg) Less than 38 Less than 40 Less than 42 Less than 44 Less than 46 Less than 48 Less than 50 Less than 52 Number of student 0 3 5 9 14 28 32 35
Q.5. find the missing frequency ( N = 100, median = 32 )
Ans. X=9, y= 16 (3)
 Marks ob. 0-10 10-20 20-30 30-40 40-50 50-60 Total No. of student 10 ? 25 30 ? 10 100
Q.6. the following table ages of 100 persons of a locality;
Ans.34.5 years (4)
 Age ( year) Number of persons 0-10 5 10-20 15 20-30 20 30-40 23 40-50 17 50-60 11 60-70 9
Draw the less than ogive and find the median.
Q.7. find the median class and the modal class for the following distribution.
Ans. 145-150 (2)
 Class interval 135-140 140-145 145-150 150-155 155-160 160-165 Frequency 4 7 18 11 6 5
Q.8. write the following distribution as more than type cumulative frequency distribution.  (2)
 Class interval 50-55 55-60 60-65 65-70 70-75 75-80 Frequency 2 6 8 14 15 5
Q.9.the mean of the following frequency distribution is 25.2 . find the missing frequency x.      ans.12   (3)
 Class interval 0-10 10-20 20-30 30-40 40-50 Frequency 8 X 10 11 9
Q.10. find the mode.                      Ans.       39           (3)
 Class interval 5-15 15-25 25-35 35-45 45-55 55-65 65-75 2 3 5 7 4 2 2
Q.11. Draw less than ogive for the following distribution and hence obtain the median.
Ans. 58.75         (4)
 Marks obtain 10-20 20-30 30-40 40-50 50-60 60-70 70-80 No. of student 3 4 3 3 4 7 9
Q.12. find the mode:      Ans. 36.25                           (2)
 Marks obtain 0-10 10-20 20-30 30-40 40-50 No. of student 6 10 12 32 20

#### 1 comment:

1. I solved these questions and got some right results almost ten were right out of twelve.
Math Order of Operations