# Combinatorics - math word problems - page 42 of 43

#### Number of problems found: 853

- Non-conforming 19863

The probability that a quality product will meet all technical requirements is 0.95. What is the probability that all three randomly produced products will be: a) conforming, b) non-conforming - Sales

From statistics of sales goods, item A buys 51% of people, and item B buys 59% of people. What is the probability that from 10 people buy 2 item A and 8 item B? - Doctors

The drug successfully treats 90% of cases. Calculate the probability that it will cure at least 18 patients out of 20. - Family

Ninety-four boys are born per 100 girls. Determine the probability that there are two boys in a randomly selected family with three children. - Instructions 10282

Find out if two people in Bratislava have the same number of hairs on their heads. Instructions. Bratislava has about 420,000 inhabitants, and a person has less than 300,000 hairs on his head. - The university

At a certain university, 25% of students are in the business faculty. Of the students in the business faculty, 66% are males. However, only 52% of all students at the university are male. a. What is the probability that a student selected at random in the - Probability 73054

We roll six dice. What is the probability that: a) a six falls twice b) six falls four times - Drinks

In a country, 65% of people drink coffee, 50% drink tea 25% drink both. What is the probability that a person chosen at random will drink neither tea nor coffee? - Double probability

The probability of success of the planned action is 60%. What is the probability that we will achieve success at least once if this action is repeated twice? - Left handed

It is known that 25% of the population is left-handed. What is the probability that there is a maximum of three left-handers at a seminar with 30 participants? - Dice

We throw five times the dice. What is the probability that six fits exactly twice? - Circles

How many different circles are determined by 11 points at the plane if 7 of them lie in a straight line? - Alarm systems

What is the probability that at least one alarm system will signal the theft of a motor vehicle when the efficiency of the first system is 90% and of the independent second system 80%? - Probability 7628

The probability that six will fall in just three rolls is once? - TV fail

The TV has average 35 failures after 10,000 hours. Find the probability of TV failure after 400 hours of operation. - Birthday paradox

How large is the group of people so that the probability that two people have a birthday on the same day of the year is greater than 90%? - Three shooters

Three shooters shoot, each time, on the same target. The first hit the target with 0.7, the second with 0.8, and the third with 0.9 probability. What is the probability of hitting the target: a) just once b) at least once c) at least twice - Probability 71174

Find the probability that one will fall at least once in three rolls. - Family

What is the probability that a family with 3 children has: exactly 1 girl? 3 girls and 0 boys? Consider the birth probability of a girl is 48.61% and a boy 51.39%. - All use computer

It is reported that 72% of working women use computers at work. Choose three women at random, and find the probability that all three women use a computer in their jobs.

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