# School trip

On a school trip, 17 of the 28 children bought ice cream or chocolate in a candy store. Twelve children bought chocolate, and nine children bought ice cream. How many children bought ice cream and chocolate? How many children did not buy ice cream? How many children did not buy chocolate?

Result

a =  4
b =  19
c =  16

#### Solution:

$a = 12+9-17 = 4$
$n = 28-17 = 11 \ \\ b = n + (12-a) = 11 + (12-4) = 19$
$c = n + (9-a) = 11 + (9-4) = 16$

Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Showing 0 comments:
Be the first to comment!

## Next similar math problems:

1. 45th birthday
This year Mrs. Clever celebrated her 45th birthday. Her three children are now 7.11 and 15 years old. In how many years will Mrs. Clever's age be equal to the sum of her children's years?
2. Video game
Nicole is playing a video game where each round lasts 7/12 of an hour. She has scheduled 3 3/4 hours to play the game. How many rounds can Nicole play?
3. Common divisors
Find all common divisors of numbers 30 and 45.
4. Numbers division
Which number should be divided by 2 3/4 to get 11/12?
5. A baker
A baker has 5 1/4 pies in her shop. She cut the pies in pieces that are each 1/8 of a whole pie. How many pieces of pie does she have?
6. Simple equation 10
35= 7*3*x what is x?
7. Adding mixed 3
Why does 1 3/4 + 2 9/10 equal 4.65? How do you solve this?
8. Sum of the digits
How many are two-digit natural numbers that have the sum of the digits 9?
9. Coal mine
The towing wheel has a diameter of 1.7 meters. How many meters does the elevator cage lower when the wheel turns 32 times?
10. The fruit basket
The fruit basket is five times heavier than the empty basket. Filled is 20kg heavier than empty. Determine the weight of the fruit in the basket.
11. An equilateral triangle
The perimeter of an equilateral triangle is 33cm. How long is each side?
12. Dividing money
Vilem, Cenek, and Edita divided the money they earned by spreading the leaflet. Vilem got 240 CZK more than Cenek and twice more than Edita. Edita got 400kc less than Vilem.
13. Radius of the circle
Calculate the radius of the circle whose length is 107 cm larger than its diameter
14. Brick weight
The brick weighs 2 kg and a half bricks. How much does one brick weigh?
15. Forestry workers
In the forest is employed 56 laborers planting trees in nurseries. For 8 hour work day would end job in 37 days. After 16 days, 9 laborers go forth? How many days are needed to complete planting trees in nurseries by others, if they will work 10 hours a d
16. Three cats
If three cats eat three mice in three minutes, after which time 260 cats eat 260 mice?
17. Divisibility
Is the number 761082 exactly divisible by 9? (the result is the integer and/or remainder is zero)