Question

lt has been found from an experiment that 40 percent of rats get stimulated on administering a particular drug. If 5 rats are given this drug, What is the probability that(1) exactly three and (2) all rats get stimulated?

Answer 1

Answer:

0.02304    =  (0.4)³(0.6)²

0.01024      =  (0.4)⁵

Step-by-step explanation:

Probability that rat get stimulated on administering a particular drug = 40/100 = 0.4

Not getting stimulated = 0.6

probability that exactly three  out of 5 = (0.4)³(0.6)²

= 0.02304

probability that all rats get stimulated = (0.4)⁵ = 0.01024