Question

Range 0–10 11–20 21–30 31–40 41–50

Number of Students 8 12 30 25 15

The table shows the range of scores obtained by 9th grade students on a math test and the number of students in each range. If a student is picked at random, the probability that his or her score is between 21 and 40 is
.

Answer 1

if you’re looking for the percentage it’s 61%

Answer 2

Answer:
`(11)/(18)`

Explanation:

From the given table , the total number 9th grades students gave math test =

`8+12+30+25+15=90`

The number of 9th grades students got score between 21 and 40 =
`30+25=55`

Now, If a student is picked at random, the probability that his or her score is between 21 and 40 is is given by :-

`(55)/(90)=(11)/(18)`

Hence, the probability that his or her score is between 21 and 40 is
`(11)/(18)`