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# help urgently plz

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Andy spins a fair spinner numbered 1 - 5 and rolls a fair dice.
What is the probability of obtaining a multiple of 4 and a factor of 15?

Nov 27, 2018

#1
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I assume the spinner and die are independent.  So

$$P[\text{spinner is multiple of 4} \cap \text{dice is factor of 15}] = \\ P[\text{spinner is multiple of 4}]P[\text{dice is factor of 15}] = \\ \dfrac{1}{5} \dfrac{1}{2} = \dfrac{1}{10}$$

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Nov 27, 2018

#1
+6099
+1
$$P[\text{spinner is multiple of 4} \cap \text{dice is factor of 15}] = \\ P[\text{spinner is multiple of 4}]P[\text{dice is factor of 15}] = \\ \dfrac{1}{5} \dfrac{1}{2} = \dfrac{1}{10}$$