One compant is working your area code tonight, 10 people each making an average of 20 calls per hour. If it takes your family a half hour to eat supper, whats the probability you get a call during?

Question

One company is working your area code tonight, 10 people each making an average of 20 calls per hour. If it takes your family a half hour to eat supper, what’s the probability you get a call during mealtime?

Answer 1

Number of call in half an hour 20 {calls/hr} x 10 {callers} x .5 {half ab hour} = 100 calls

Number of possible calls = 10^7 {maximum number of possible calls in any area code is a 7 digit number {but you can probably eliminate 000 from the exchange and 0000 from the the 4digit number for each exchange}

probability of getting al call is less than 100/10^7 or 1/10^5 or 0.001%