Answer:
7 percent
Step-by-step explanation:
We have the following information from the question:
The probability that a student chooses art as an elective is 15 percent: 
The probability that a student chooses art or drama is 20 percent: 
The probability that a student chooses both art and drama is 2 percent:
Recall that:
We plug in the various probabilities to get:
Hence the probability that a student chooses drama as an elective is 7 percent
Answer:
72 kg
Step-by-step explanation:
For concreatting a tower cement, sand, stones are in the ratio 1:2:4 For 144kg sand.. What amount of cement is required?
We are given the ratio
cement: sand:stones
= 1:2:4
The sum of proportion =
1 + 2 + 4 = 7
We are given the kg of sand = 144kg
Step 1
We find the total kg of cement, sand and stones = x
Using the proportion of sand,
2/7 of x = 144kg
2/7 × x = 144kg
2x/7 = 144kg
Cross Multiply
2x = 7 × 144kg
x = 7 × 144kg/2
x = 504kg
Therefore the total kg of cement, sand and stone = 504kg
Step 2
The amount of cement required is calculated as:
1/7 × 504 kg = 72 kg
Therefore, 72kg of cement is required.
He would be 108, You do 36 times 3 and that is equal to 108.
Answer:
-58
Step-by-step explanation:
-|123+(-1)|/2-(-3)
-|122|/2-(-3)
-122/2-(-3)
-61-(-3)
-58
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Step-by-step explanation:
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