Answer:
21/55
Step-by-step explanation:
dividamos por 5
= 21/55
The natural numbers from 1 to 30:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30.
The prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29.
a. 17 b. 16/24
a. Find the midpoints of each class interval which is:
7.5 x 2 = 15
12.5 x 9 = 112.5
17.5 x 5 = 87.5
22.5 x 5 = 112.5
27.5 x 3 = 82.5
Add all of these up to give 410
Add up the total of the frequency column which is 24
410 / 24 = 17.0833.....
Rounded to 2 significant figures, the answer is 17
b. Add together all the people under 20 which totals to 16 and put this over the total of 24 to give the fraction 16/24
