The price after the sale is (18/22.5)*100 = 80% from the original price
so, the percentage of decrease in the price of the shirt is 100% - 80% = 20%
another way,
how much is decreased / original price *100
(22.5-18) / 22.5 *100 = 20%
Answer:
a) 0.9961
b) 0.9886
Step-by-step explanation:
We are given the following information:
We treat passenger not showing up as a success.
P(passenger not showing up) = 0.10
Then the number of passengers follows a binomial distribution, where
where n is the total number of observations, x is the number of success, p is the probability of success.
Now, we are given n = 125
a) probability that every passenger who shows up can take the flight

b) probability that the flight departs with empty seats

Answer:
-3± √5
Step-by-step explanation:
It is given that,
m² + 6m = -4
<u>Points to remember</u>
Solution of a quadratic equation ax² + bx + c = 0
x = [-b ± v(b² - 4ac)]/2a
<u>To find the solution of given equation</u>
m² + 6m = -4
⇒ m² + 6m + 4 = 0
Here a = 1, b = 6 and c = 4
m = [-b ± v(b² - 4ac)]/2a
= [-6 ± √(6² - 4*1*4)]/2*1
= [-6 ± √(36 - 16)]/2
= [-6 ± √20]/2
= [-6 ± 2√5]/2
= -3± √5