Sets + reason - practice problems
Number of problems found: 94
- Flowers 6229
There are 20 flowers in the vase. There are 15 white flowers and ten roses. Are there white roses in the vase? - Conditional 73664
I roll a 7-wall dice. What is the conditional probability that three fell if an odd number fell? - Ten boys
Ten boys chose to go to the supermarket. Six boys bought gum, and nine boys bought a lollipop. How many boys bought gum and a lollipop? - Subsets
How many 19 element subsets can be made from the 26 element set? - Trousers
In the class were 12 students. Nine students were wearing trousers and turtlenecks eight. How many students wore trousers with a turtleneck? - Classroom 3
How many children are in the classroom, where 13 children are higher than Lenka and nine children lower than Lenka? - Probability 68564
What is the probability that the number a) greater than 4, b) Will the number greater than four fall on the dice roll? - Pupils
There are 27 pupils in the classroom. They can swim 21 and ski nine pupils. Neither swim nor ski three pupils. How many pupils can swim and ski? - Glasses
There are 36 pupils in the class. Nine girls wear glasses. Boys with glasses are five less than girls without glasses. Boys without glasses are two times more than girls without glasses. How many boys and how many girls? - Rings - intersect
There are 15 pupils on the sporting ring. Ten pupils go to football, eight pupils go to floorball. How many pupils go to both rings at the same time? - Three 241
Three-fifths of the t-shirts in a t-shirt shop are blue. Five-eights of those T-shirts are on sale. One-third of the blue of the blue shirts that are on sale are size medium. What fraction of the shop's blue T-shirts are on sale and size medium? - Buffet
At the school, buffet were 30 children. Twenty-one children bought sandwiches, and 15 children bought lemonade. Four children did not buy anything. How many children bought lemonade and sandwiches? - Expensive 5658
An unnamed brand TV is the store's fifth most expensive and tenth cheapest TV. How many different TVs are there in the store? - Shelter 5316
The sun rises east of the shelter and sets in the west. A goat would gather a little shade. Where and what kind of tree should be planted so that it does not bypass it? - PRESSCENTRUM 4364
In the morning, 65 buyers bought newspapers or magazines at the PRESSCENTRUM stand. The newspaper bought 53 buyers and the magazine 24 buyers. How many buyers bought both newspapers and magazines? - Skoda cars
There were 16 passenger cars in the parking. It was the ten blue and 10 Skoda cars. How many are blue Skoda cars in the parking? - Following 34291
The following holds for two non-empty sets, A and B: A ∪ B has 16 elements, A ∩ B has 11 elements, and the set A - B is empty. How many elements does set B-A to have? - Fall sum or same
Find the probability that if you roll two dice, it will fall the sum of 10, or the same number will fall on both dice. - 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? - Dices throws
What is the probability that the two throws of the dice: a) Six falls even once b) Six will fall at least once
Do you have homework that you need help solving? Ask a question, and we will try to solve it.