Question

A group of students went to another city to collect the data of monthly consumption (in units) to complete their statistics project. They prepare the following frequency distribution table from the collected data gives the monthly consumers of a locality
Monthly consumption No.of consumers
(in units).
65-85. 4
85-105 5
105-125 13
125-145 20
145-165 14
165-185 8
185-205 4
If a consumer is selected at random, find the probability that their monthly
consumption is

(a)Less than 125 units
(i)$\frac{18}{68}$ (ii) $\frac{9}{68}$ (iii) $\frac{22}{68}$ (iv)$\frac{13}{68}$

(b)More than or equal 145 units
(i)$\frac{26}{68}$ (ii)$\frac{46}{68}$ (iii)$\frac{14}{68}$ (iv)$\frac{34}{68}$

(c)Less than 205 units
(i) 1 (ii)0 (iii)68 (iv) 0.68

(d)More than or equal to 105 units but less than 165 units
(i)$\frac{27}{68}$ (ii)$\frac{47}{68}$ (iii)$\frac{13}{68}$ (iv)$\frac{14}{68}$

(e)Less than 65 units
(i) 1 (ii)0 (iii)68 (iv) 0.68

Answer 1

Answer:

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