Probability - math word problems - page 22 of 27
Number of problems found: 536
- Cake ratio
On the tray, they had apricot and plum cakes in a ratio of 3:2. After eating three apricot pies, the chance of taking out a plum and apricot was the same. How many cakes were there together on the tray at the beginning? - Probability of Encyclopedia
The shelf contains 27 atlases, 29 dictionaries, eight textbooks, and 16 encyclopedias. What is the probability that a randomly selected book from this shelf is an encyclopedia? Give the result as a percentage. - Bulbs - short lifespan
The life of the bulbs has a normal distribution with a mean value of 2000 hours and a standard deviation of 200 hours. What is the probability that the light bulb will last for at least 2100 hours? - Normal Distribution Probability The waiting time in the buffet is governed by the normal distribution with a mean value of 130 seconds and a variance of 400. What is the probability that someone will wait less than a minute and a half?
- Probability of First Pie
Grandma used to cook sheep and cottage cheese pies together. There were 30 made from sheep cheese and 5 fewer made from cottage cheese. George took the first one and got 6 brownies and 3 curds. What is the probability that my first pie will not be bronze? - Multiple-choice test
Students are writing a multiple-choice test with 10 questions, with answer options a), b), c), where always only one answer is correct. The teacher told them that in the test the number of correct answers is as follows: option a) 5 times, option b) 3 time - Quality class
The probability that a product is of 1st, 2nd or 3rd quality class is 0.5, 0.3 and 0.2. The probability that products in these quality classes pass acceptance inspection at the customer is respectively 0.9, 0.7 and 0.2. a) What is the probability that a r - Dice
We throw five times the dice. What is the probability that six fits precisely twice? - Raffle
There are 200 tickets in a raffle, but only 20 are winners. What is the probability that a group of people who bought 5 tickets together wins at least 4 prizes? - Probability of Not Winning There are 200 tickets in the raffle with one main prize. Miško bought 25 tickets. What is the probability that Miško will not win the main prize?
- Probability - Number Less Six
There are 1 to 20 start numbers in the draw. What is the probability that the first downhill racer drawn will have a start number less than 6? - Test
The teacher prepared a test with ten questions. The student can choose one correct answer from the four (A, B, C, D). The student did not get a written exam at all. What is the probability that: a) He answers half correctly. b) He answers all correctly. c - Electricity
Many companies providing public utility services promote energy saving by offering discount rates for consumers who keep their energy consumption below certain set standards. A recent EPA report states that 70% of the inhabitants of a monitored region red - Dice probability
Jana rolls two dice at the same time. What is the probability that she will score a total of four points? - Red balls
The bag has three red, 12 blue, and eight green balls. If we want the probability of pulling out the red balls to be 20%, how many red balls must we add to the bag? - Target probability
Viktor shot darts into a circular target with a radius of 5 cm. Inside the circle is a smaller circle with a radius of 2 cm. Calculate Viktor's chance of hitting a smaller circle in percent. - Six on dice When throwing two dice, what is the probability they will fall at least one six?
- Sum on dice We have two dice. What is the greater likelihood of falling a total sum of 7 or 8? (write 7, 8, or 0 if the probabilities are the same)?
- Sum or product
What is the probability that two dice fall will have the sum of seven or product 12? - Doctor 2
A doctor noted the Diastolic Blood Pressure (DBP) of a large number of patients. Later, he scrambled the data to keep the privacy of his patients. Based on the scrambled dataset, he finds that the lower inner fence is equal to 50 and the upper inner fence
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