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junior college 2 | H2 Maths

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Need help with (b)

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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