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ValentinkaMS [17]
3 years ago
7

There are 5 red marbles, 8 blue marbles, and 12 green marbles in a bag.

Mathematics
2 answers:
dolphi86 [110]3 years ago
4 0
Total number of marbles: 
5+8+12 = 25

Probability of drawing red marble = red/total 
                                                         = 5/25 =1/5

Percentage of drawing red marble: 1/5 x 100 = 20%

Ans: 20%
cricket20 [7]3 years ago
3 0
  To find the percentage always multiply whatever decimal number you have by 100% <span>
1) 5 + 8 + 12 = 25 (total number in bag) 
5/25 x 100% (because you're trying to find probability of red) 
= 20% 

2) 5 + 8 = 13 (# of red AND blue) 
13/25 x 100% (divide out of the total) 
=52% 

3) 5/25 = 0.2 x 12/25 = 0.48 (find probability of drawing red and green) 
0.2 x 0.48 x 100% 
= 9.6% 

4) 10 + 12 + 28 = 50 (to find total number of trials) 
28/50 x 100% 
= 56% 

5) 5 x 7 (number of sections on first spinner multiply by # of sections on second spinner) 
= 35</span><span>Its B 20%


</span>
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