The box contains only blue, red and green pens. There are 15 blue pens and 15 green pens. Complete the table Colour of pen Blue Red Green Number of pens 15 15 Probability 0.4
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probability chapter is too easy if u will go through the example then definitely u will be able to solve this question
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Answer:20
Step-by-step explanation:
The probaility of getting red is = 0.4 , thus the probaility of not getting red is 0.6 . since the green and blue pens are equal in number that makes them to have the same probality . 0.6/2 = 0.3 for both green and blue .
to find the number of red pens :
look at how the probaility of blue or green is made (it doesn't matter since both are equal)
15 / x = 0.3 (x = the total number of pens )
x=50 (that's the total number )
15 + red + 15 = 50
red = 50-30=20
there are 20 red pens
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