# Combinatorial number - problems

- A pizza

A pizza place offers 14 different toppings. How many different three topping pizzas can you order? - Family

94 boys are born per 100 girls. Determine the probability that there are two boys in a randomly selected family with three children. - Boys and girls

There are 11 boys and 18 girls in the classroom. Three pupils will answer. What is the probability that two boys will be among them? - Three numbers

We have three different non-zero digits. We will create all 3 digits numbers from them to use all 3 figures in each number. We add all the created numbers, and we get the sum of 1554. What were the numbers? - Internet anywhere

In school, 60% of pupils have access to the internet at home. A group of 8 students is chosen at random. Find the probability that a) exactly 5 have access to the internet. b) At least 6 students have access to the internet - Each with each

Five pupils from 3A class played table tennis. How many matches did they play with each other? - Word

What is the probability that a random word composed of chars T, H, A, M will be MATH? - Chocolates

In the market have 4 kinds of chocolates. How many ways can we buy 19 chocolates? - Rectangles

How many rectangles with area 3032 cm^{2}whose sides is natural numbers are? - Candy

How many ways can divide 16 identical candies to 4 children? - Sales

From statistics of sales goods, item A buy 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? - Stacks

Annie has a total of $ 702. The money must be divided into stacks so that each buyer has the same amounth of dollars. How many options she have? - N-gon

How many diagonals has convex 11-gon? - Pairs

From the five girls and four boys teachers have to choose one pair of boy and girl. A) How many such pairs of (M + F)? B) How many pairs where only boys (M + M)? C) How many are all possible pairs? - 2nd class combinations

From how many elements you can create 4560 combinations of the second class? - Party

At party overyone clink with everyone. Together, they clink 171 times. How many people were at the party? - Lines

In how many points will intersect 14 different lines, where no two are parallel? - Commitee

A class consists of 6 males and 7 females. How many committees of 7 are possible if the committee must consist of 2 males and 5 females? - Family

What is the probability that a family with 7 childrens have: exactly 5 girls? 7 girls and 0 boys? Consider the birth probability of a girl is 48.69% and boy 51.31%. - Bulbs

The probability that the bulb can operate 5000 hours is 0.16. What is the probability that exactly one of three bulbs can operate 5000 hours?

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