Question

38. Frogs A wildlife biologist examines frogs for a genetic trait he suspects may be linked to sensitivity to industrial toxins in the environment. Previous research had established that this trait is usually found in 1 of every 8 frogs. He collects and examines a dozen frogs. If the frequency of the trait has not changed what's the probability he finds the trait in a) none of the 12 frogs? olgo b) at least 2 frogs? c) 3 or 4 frogs? dns d) no more than 4 frogs? 15bi2no0 veoms 1o

Answer 1

Gineme 2 X ~ 12 12 O201 (t).( 12- 2 C ex 2) (t)(t) z o .u S 3 3 125 3 7) Pl3) elx= 12 c 2- (7) plxu) -O-983