Question

Ok i realy am thrash at word problems!!

Answer 1

Hey there! :)

The lowest number is 72. The greatest is 98. The intervals are by 5. Find the difference between 72 and 95 and divide by 5. If there is a remainder, add 2 to the whole number.

98 - 72 = 26

26 ÷ 5 = 5.2

The whole number is 5. If you leave it 5.2, that won't be an interval. That's why you add 1. 5 + 1 = 6

Remember that you din't start from 1. You started from 72. Add an interval from 1 - 72 and leave it empty.

6 + 1 = 7

Answer ⇒ 7

:)

Answer 2

Hi!

So I included an image of a histogram I made, but here is another way to solve this. 

Write all the numbers in order.
72, 78, 81, 86, 86, 87, 92, 92, 92, 98

Now, starting at 70, and with the interval length being 5, let's see how many bars there are. 
   72    |    78     |    81    |  86,86,87 | 92,92 |    98
70-75 |  76-80  | 81-85 |   86-90     | 91-95 | 96-100 
 BAR 1   BAR 2   BAR 3   BAR 4       BAR 5  BAR 6

Hopefully, that makes a little bit of sense. But I also included an image of an actual histogram.

The answer is 6 bars.

Hope this helps!
-Peredhel