How to solve this? Im just used to x-mean/std. This one is completely different. Thanks.How to solve this? Im just used to x-mean/std. This one is completely different. Thanks.

Lung Cancer accounts for 31% of somking related deaths. If 12 smoking related deaths are randomly selected, what is probability 3 of them will show lung cancer?

Answer is supposed to be 0.2323

Lung Cancer accounts for 31% of somking related deaths. If 12 smoking related deaths are randomly selected, what is probability 3 of them will show lung cancer?

Answer is supposed to be 0.2323