Question

given below is the frequency distribution of daily wages in Rupees of 30 workers in a certain factory
Daily wages in RS //No.of workers
110-130. // 3
130-150. // 4
150-170. // 5
170-190. // 6
190-210. // 5
210-230. // 4
230-250. // 3.
A worker is selected at random find the probability that his wages are:
a. less than rupees 150
b. at least RS 210
c. more than or equal to rupees 150 but less than rupees 210
d. in the interval 192 -250

Answer 1

pls refer this pic. first we took total frequency.

Answer 2

Answer:

1. 3+4=7

7/30

2. 4+3=7

7/30

3. 5+6+3+4=16

16/30= 8/15

4. 5+4+3=12

12/30=6/15=2/5

Step-by-step explanation: