Question

M
Wennd that highest marks are 95 and lowest marks are 48.
(ii) Range of the marks = 95 - 48 = 47
(iii) Mean marks =
75+86 +90 +64 +59 +48 +56 +95 +81 +85 739
= 73.9
10
10
Example 2.
F
Solution:
Exercise 3.1
1. Find the mean of first 5 whole numbers.
2. Find the mean of first 12 even natural numbers.
3. Avnish studies for 6 hours, 4 hours and 8 hours on three consecutive days. How many hours does
he study daily on an average? Can you say that Avnish studies for 4 hours daily on an average?
4. A batsman scored the following number of runs in 9 inning: 84, 90, 103, 78, 83, 93, 88, 75, 80.
What is average scored in an inning.
5. The ages of 10 teachers in a school are 42, 31, 28, 64, 35, 29, 50, 33, 48, 40.
(i) What is the age of the oldest teacher and that of the youngest teacher?
(ii) What is the range of the ages of the teachers? 36
(iii) What is the mean age of these teachers?
The marks (out of 100) obtained by a group of students in statistics test are 90, 84, 39, 48, 56, 95,
81 and 75. Find the:
(i) Highest and the lowest marks obtained by the students.​

Answer 1

Hence,ur answer will will be 2...

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