Question

2) The daily rainfall for each day of a week in a certain city is given in millimetres. Find the average rainfall during the week.
9, 11, 8, 20, 10, 16, 12
4)
5) Find the mean of first six multiples of 5.
6) If the mean of 8, 10, 7, x + 2 and 6 is 9, find the value of x.
8) The height of 30 children in a class is given in centimetres. Draw up a frequency table of this data using tally marking
131, 135, 140, 138, 132, 133, 135, 133, 134, 135, 132, 133, 140, 139, 132, 131, 134, 133, 140, 140, 139, 136, 137, 136, 139, 137, 133, 134, 131, and 140
9) In a certain colony, there are 50 families. The number of people in every family is given below. Draw up the frequency table using tally mark
5, 4, 5, 4, 5, 3, 3, 3, 4, 3, 4, 2, 3, 4, 2, 2, 2, 2, 4, 5, 1, 3, 2, 4, 5, 3, 3, 2, 4, 4, 2, 3, 4, 3, 4, 2, 3, 4, 5, 3, 2, 3, 2, 3, 4, 5, 3, 2, 3,
10) A dice was cast 40 times and each score noted is given below. Draw up a frequency table for this data.
3, 2, 5, 6, 4, 2, 3, 1, 6, 6, 2, 3, 5, 3, 5, 3, 4, 2, 4, 5, 4, 2, 6, 3, 3, 2 4, 3, 3, 4, 1, 4, 3, 3, 2, 2, 5, 3, 3, 4
1) Find the median of :
(i) 5, 7, 9, 11, 15, 17, 2, 23 and 19
(ii) 9, 3, 20, 13, 0, 7 and 10
3) Find the mean, the median and the mode of:
(i) 12, 24, 24, 12, 30 and 12
(ii) 21, 24, 21, 6, 15, 18, 21, 45, 9, 6, 27 and 1
Find the mode of:
(i) 5, 6, 9, 13, 6, 5, 6, 7, 6, 6, 3
(ii) 7, 7, 8, 10, 10, 11, 10, 13, 14
7) The pocket expenses (per day) of Anuj, during a certain week, from Monday to
Saturday were ₹85.40, ₹88.00, ₹86.50, ₹84.75, ₹82.60 and ₹87.25. Find the mean
pocket expenses per day

Answer it pls

Answer 1

Answer:

this picture is 8th numbers answer and 10 th number

2. Average =

numbersofterms

sum of terms

=

7

9+12+11+8+20+16+18

=

7

94

=13.43mm

5. formula of mean

. sum / total

. hence , 5 + 10 + 15 + 20 + 25 + 30 divided by 6

. 105 divided by 6

. answer is 17 .5

6. The mean 8, 10, 7, x + 2 and 6 is 9

∴ (8 + 10 + 7 + x + 2 + 6)/6 = 9

⇒ (x + 33)/6 = 9 ⇒ x + 33 = 9 × 6

⇒ x = 54 – 33 ⇒ x = 21