# NCERT Class 9 Solutions: Probability (Chapter 15) Exercise 15.1-Part 4

Glide to success with Doorsteptutor material for NCO : fully solved questions with step-by-step explanation- practice your way to success.

Q-8 The distance (in km) of engineers from their residence to their place of work were found as follow:

What is the empirical probability that an engineer lives:

I. Less than from her place of work?

II. More than or equal to from her place of work?

III. Within from her place of work?

Solution:

Total number of engineers

**Solution I:**

Number of engineers living less than from her place of work

Required probability

**Solution II:**

Number of engineers who live more than or equal to from their work place

Required probability

**Solution III:**

Number of engineers who live within from their place of work

Required probability

Q-11 Eleven bags of wheat flour, each marked 5 kg, actually contained the following weights of flour (in kg):

Find the probability that any of these bags chosen at random contains more than 5 kg of flour.

Solution:

Total numbers of bags

All bags containing more than 5 kg of flour

Required probability