Passage:
The adjoining Histogram shows frequency distribution of ages of 20 teachers in a school. Based on Historgram choose correct option for question no 70-72.
How many the numbers of teachers of age group 40-50 is more than the number of teachers of age group '20-30' is
Answer & explanation
Correct answer: option 3
No. of teachers in age group 40-50 = 7
No. of teachers in age group 20-30 = 3
Difference = 7 - 3 = 4