# Reason + percentages - math problems

#### Number of problems found: 82

• Inflation What is better for people (employees)? ?
• Probability How probable is a randomly selected three-digit number divisible by five or seven?
• Three reds What is the probability that when choosing 3 carats from seven carats, all 3 reds will be red?
• Extreme temperatures USA hit extreme heat wave. Calculate percentage of the air temperature change from normal summer temperature 23 °C to 40 °C.
• Win in raffle The raffle tickets were sold 200, 5 of which were winning. What is the probability that Peter, who bought one ticket will win?
• Medicine We test medicine on 6 patients. For all drug doesn't work. If the drug success rate of 20%, what is the probability that medicine does not work?
• Two aces From a 32 card box we randomly pick 1 card and then 2 more cards. What is the probability that last two drawn cards are aces?
• Test points If you earned 80% of the possible 40 points, how many points did you miss to get 100%? How large must the group of people be so that the probability that two people have a birthday on the same day of the year is greater than 90%?
• Discount The dress was discounted by CZK 115, which was 12% of the original price. What is the cost of the dress after the discount?
• Accidents The count of accidents in 1995 caused 8780 women which is 8.4%. How many men caused the accidents?
• Unknown number 10 Number first increased by 30%, then by 1/5. What percentage we've increased the original number?
• On a farm On a farm, there are 90 rabbits, 700 sheep, 300 cattle and 500 pigs. What percentage of the total number of animals are rabbits?
• TV fail The TV has after 10,000 hours average 35 failures. Determine the probability of TV failure after 400 hours of operation.
• Bonus The gross wage was 1323 USD including 25% bonus. How many USD were bonuses?
• VAT on books The cost of a book in the store is 12.5 euros. How much euros is the VAT of this book? VAT is 10%.
• The city In the city is 2/4 of women married to 3/4 men. What percentage of townspeople is single (not married)?
• 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 where there are 30 participants?
• Temperature calculus Calculate the percentage of temperature increase if changed from 18°C to 33°C?
• VAT John paid 1000 Euros in store for purchase. Calculate value added tax (VAT), which paid in purchase, if the VAT rate is 20%.

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