Question

I need help with how to solve this problem. It is #14. It already shows the answer (1point) but I need help on how to get there please.

Answer 1

Option 4: 0.554

Explanation:

As we can see that the intervals and their frequencies are given.

We have to calculate the probability of students' score falling between 70 and 89. It will use the frequency of both intervals 70-79 and 80-89.

So, combined scores of both intervals are:

172+105 = 277

Now to find the probability

= 277/500

=0.554

So option no 4 is the correct answer ..