Airline companies raise and lower their ticket prices based on the supply and demand. due to high numbers of fliers, one company decided to raise their ticket price for a first-class ticket to $192.50, which represents a 10% price increase.
how much did the first-class tickets cost before the price increase?

The raised price represents 110% of the original price (100% plus the extra 10%)

A percentage is converted into a decimal multiplier by dividing by 100:


To clarify the final stage, consider this (where is the original price):



From here, basic algebraic rules make solving for easy:


Therefore the original price of a ticket was $175

No. of Persons= 16

Step-by-step explanation:

There was a one phone line

Average no of people calling = 60 in one hour

% of all callers at most can get busy signal

Probability < 0.6

Probability for less than 1 person on hold = 0.2642

No of persons = 0.2642(60)

= 15.852 or 16

16 persons in hour the company is able to put on hold