Answer:
Probability that he or she has no desire in skiing lessons is 57/80
Step-by-step explanation:
Probability is given by number of possible outcomes ÷ number of total outcomes
Probability he or she has interest in skiing lessons is 115/400
Probability he or she has no interest in skiing lessons is 1 - (115/400) = 285/400 = 57/80
Answer:
Step-by-step explanation:
Hope this helps!
Hello there!
28 recipes .......> 100%
15 recipes .......> x%
Cross multiply
28x = 15*100
28x = 1500
x= 1500/28
x ≈ 53.5%
She makes 53.5% of the recipes.
I hope that helps!
Answer:
19
Step-by-step explanation:
5x² – 3x + 5
Substitute 2 in for x
5(2)² - 3(2) + 5
Solve exponents first
5(4) - 3(2) + 5
Solve/multiply parenthesis
20 - 6 + 5
Add and subtract
19
Hope this helps :)
Answer:
374.4
Step-by-step explanation:
All items related to the maintenance are 20% more expensive, it means that each datum is 20% bigger including the average.
The variance its a dispersion measurof the data and its calculated of this way:
Here n is the number of data, is the average and represent each datum. The increment in 20% in each parameter can be represented multiplying for 1.2, of this way
Factorizing the 1.2 we have:
That is:
The new variance is