In the box are 6 bulbs with power 75 W, 14 bulbs with power 40 W and 15 with 60 W. Calculate probability that a randomly selected bulb is:
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!
To solve this verbal math problem are needed these knowledge from mathematics:
Next similar math problems:
The owner of the house is insured against natural disasters and pays 0.04% annually of the value of house 77 Eur. Calculate the value of the house. Calculate the probability of disaster, if you know that 48% of the insurance is to pay damages.
The arithmetic mean of the two numbers is 71.7. One number is 5. Calculate the second number.
From 99 children who participated in the ski course were 23 excellent skiers, 13 good and 20 average and the rest were beginners. Calculate this data in percentages.
Mrs. Vítková bought each of his three children the same shirt paid CZK 1,000. Saleswoman she returned 568,60 CZK. What was the price of one shirt?
- 100 %
How much is 100%, if 17 % is 1169?
In 7.C clss are 10 girls and 20 boys. Yesterday was missing 20% of girls and 50% boys. What percentage of students missing?
- Seeds 2
How many seeds germinated from 1000 pcs, when 23% no emergence?
Mr. Vesely got for work 874 CZK (Czech Republic Koruna). Mr. Jaros got twice less than Mr. Vesely. How much CZK got Mr. Jaros?
- Soccer team
Hilahs soccer team is trying to raise $2414 to travel to a tournament in Florida, so they decided to host a pancake for the breakfast. How many people need to attend their breakfast in order to raise $2414, if profit per one pancake is $1.5?
- Combine / add term
Combine like terms 4c+c-7c
Baker Martin baked 5 times more cakes than Dennis. How many cakes baked Dennis if Martin bake 25 cakes?
- Simple equation
Solve for x: 3(x + 2) = x - 18
Iron ore contains 57% iron. How much ore is needed to produce 20 tons of iron?
A customer purchase three (3) writing pads from a store. She receive k9.70 change from a k10.00 note . How much was it's writing pad cost?
- Obtuse angle
Which obtuse angle is creating clocks at 17:00?
The bicycle pedal gear has 36 teeth, the rear gear wheel has 10 teeth. How many times turns rear wheel, when pedal wheel turns 120x?
In the city operates 171 doctors. The city has 128934 citizens. How many citizens are per one doctor?