Answer:
1/10
Step-by-step explanation:
P(1st marble yellow) = Number of yellow / total
= 2/5
We keep the marble. Now there are four marbles in a bag. Three are green, and one is yellow.
P(2nd marble yellow) = Number of yellow / total
=1/4
P (1st yellow, keep, 2nd yellow) = 2/5 * 1/4
= 2/20 = 1/10
Answer:
0
Step-by-step explanation:
dude anythign times 0 = 0
Answer:
2.4103
Step-by-step explanation:
The first step in evaluating the sample standard deviation of a data set involves the determination of the sample mean.
The sample mean is simply the average value of the data set;
sample mean =
The next step is to evaluate the sum of the squares of deviations from the mean;
sum of squares of deviation =
We then divide the sum of squares of deviation by (n-1) where n is the sample size to obtain the sample variance;
variance =
The standard deviation is simply the square-root of variance;
Answer:
9 and 3
Step-by-step explanation:
Let the first number be x and second number be y hence their sum
x+y=12 ......(1)
Making x the subject theb x=12-y
Three times be first number is 3x
3x-y=24.......(2)
Adding the two sets of equations then
4x=36
X=36/4=9
The second number will be 12-9=3
So the first number is 9 and second is 3