Maths Tuition Singapore – Probability

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Maths Tuition Singapore – Probability

Two boxes were used to store pens.
Box A contains 3 blue pens and 7 green pens.
Box B contains 5 blue pens and 9 green pens.
Julie took a pen from Box A and placed it inside Box B. Then, she took out a pen from Box B.
Given that the selections are random, find the probability that the pen taken from Box B is green.

Answer : 97/150

Please contact Angie @ 96790479 or Mr Ong @ 98639633 if you need Additional or Elementary Maths Tuition