Question

How do I do this?

Answer 1

The events 'the first card has a one on it' and 'the second card has a two on it' are mutually exclusive. Only if the first card does not have a one on it will the second draw be required.
If two events A and B are mutually exclusive:
The probability of A and B occurring is zero. That is:
\[\large P(A\cap B)=0\]
The probability of A or B occurring is the probability of A plus the probability of B:
\[\large P(A\cup B)=P(A)+P(B).\]
Do you follow so far?

Answer 2

thx i get it now

Answer 3

Good work! You're welcome :)

Answer 4

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