Times and add. for example perimeter is adding all sides
Answer: 0.8031
Step-by-step explanation:
Binomial distribution:
For a binomial variable x,
The probability of getting success in x trials = 
, where n = Total trials .
p= Probability of getting success in each trial.
For the given situation , we take x as the number of damaged apple .
Given : The proportion of damaged apples : p=0.15
n= 10
Then, the probability that his sample will contain at least one damaged apple. :-

Hence, the required probability = 0.8031
You put all x on left side and numercial on the right side
13x-12x = 4+4
x = 8
(a) If

is the mass (in mg) remaining after

years, then


(b)

(c)