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junior college 2 | H2 Maths
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junior college 2 chevron_right H2 Maths chevron_right Singapore

Need help with (b)

Date Posted: 1 year ago
Views: 210
Chew Shao Quan
Chew Shao Quan
1 year ago
Think about the scenarios of what x1 and x2 can be when X1 - X2 >= 5.
X must minimally be 2 (1 dot on disc and 1 dot on die) and can only be max 8 (2 dot on disc and 6 dot on die)
Hence, there can only be 3 scenarios which each scenario probability can be find separately.
As each of these scenarios are mutually exclusive, you can then sum them together to get the answer.

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Tham KY
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