NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 3: Data Handling - Problems and Solutions
Question 71

Question. 71

Ages (in years) of 6 children of two groups are recorded as below:

Group AGroup B
77
79
911
812
1012
1012

(a) Find the mode and range for each group.
(b) Find the range and mode if the two groups are combined together.

Answer:

(a) Group A: Mode = 7 and 10, Range = 3.
Group B: Mode = 12, Range = 5.
(b) Combined: Range = 5, Mode = 7 and 12.

Detailed Answer with Explanation:

Group A: Max=10, Min=7 → Range=3, Modes are 7 and 10.
Group B: Max=12, Min=7 → Range=5, Mode=12.
Combined: Max=12, Min=7 → Range=5, Modes=7 and 12.

NCERT Exemplar Solutions Class 7 – Mathematics – Unit 3: Data Handling – Problems and Solutions | Detailed Answers