Chua Yong Qi's answer to Royal Lim's Secondary 4 E Maths Singapore question.

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Chua Yong Qi
Chua Yong Qi's answer
22 answers (Tutor Details)
1st
first, express the probability as a fraction just like in part (a). since the Q tells you that this probabilty is equal to 2 times that in (a), you can set up an equation to solve for x.