Since there is replacement, drawings are independent which means that the result of one of them does not affect the others.
Probability of drawing an apple is 4/10 (4 apple out of 10 fruits)
Probability of drawing an apricot is 2/10
Probability on one happening consecutively to the other (thanks to independence) is 4/10*2/10=8/100
Which can be simplified to 2/25
Answer:
Step-by-step explanation:
Answer:
270
Step-by-step explanation:
Given that :
Ratio = 14:8:5
Houses : flats : bungalow
Number of bungalow = 50
Sum of ratio = (14 + 8 + 5) = 27
Let total number of households = x
Bungalow = 5/27 * x
5/27 * x = 50
5x / 27 = 50
5x = 50 * 27
5x = 1350
x = 1350 / 5
x = 270
Number of places to live = 270
Answer:
P [ Z < 66 ] = 35,15 %
Step-by-step explanation:
Normal Distribution
Population mean μ₀ = 75,4
Standard deviation σ = 5,2
Then:
P [ Z < 66 ] = ( 66 - 75,4 ) / 5,2
P [ Z < 66 ] = - 9,4 / 5,2
P [ Z < 66 ] = - 1,81
In z-table we look for the reciprocate area for that z score and find
P [ Z < 66 ] = 0,3515
P [ Z < 66 ] = 35,15 %
