First you want to find out how many marbles you start with so it'd be 8+7=15. You start with 15 marbles. If you randomly drew a blue marble, it'd be 8:15 and if you drew a yellow marble without replacing the blue one, it'd be 7:14 or 50-50 chance.
Increase from 28 to 35
Increase = 35 - 28 = 7
% Increase = (7/28) * 100% = (1/4) * 100% = 25%
% Increase = 25%
a. How many males surveyed preferred playing sports?
The relative frequency of men who prefer sports is:
0.30
Therefore, for this case we have:
(0.30) * (200) = 60
60 males surveyed preferred playing sports
b. How many people surveyed preferred to read a book?
The people who prefer to read books are:
0.10 + 0.15 = 0.25
Then, of the quantity interviewed we have:
(0.25) * (200) = 50
50 people surveyed preferred to read a book
c. How many females were surveyed?
The number of women interviewed is:
0.15 + 0.05 + 0.15 = 0.35
(0.35) * (200) = 70
70 females were surveyed
Quadrilateral angles sum up to 360
The two angles when sum up will be
The other two angles when sum up will be
This angle 160 is shared in the ratio 3:5
We will add the two ratios up which will be
To get one angle we will divide 3 by 8 n multiple the results by 160 . this will be
The other angle can be solve in two ways
First approach
160-60=100
Second Approach
Using the earlier method
The two angles are 60 and 100
7. Continuous. and your other answers are correct for all i know. good luck