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Lunna [17]
3 years ago
15

There are 3 red and 9 blue counters in a box. A counter is chosen and then replaced. If you did this 144 times, how many times w

ould you expect to get a blue?
Mathematics
1 answer:
anygoal [31]3 years ago
3 0
If you do it 144 times that is (3+9)*12
This means that 12 times 3 red and 9 blue counters will be chosen that means that 9 blue counters will be chosen 12 times. 9*12 is 108.
This means blue counters will be chosen 108 times.
This can be checked as 108/3 would give you the number of red counters which is 36 and 108+36 is 144 

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Step-by-step explanation:

Solution for What is 75 percent of 600:

75 percent * 600 =

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Percentage solution with steps:

Step 1: Our output value is 600.

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Step 4: Similarly, $x=75\%$x=75%​.

Step 5: This results in a pair of simple equations:

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Step 6: By dividing equation 1 by equation 2 and noting that both the RHS (right hand side) of both

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600

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Step 7: Again, the reciprocal of both sides gives

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