Total number of marble = 10
3green
2red
5 blue
Probability that the first marble is red = 2/10
Probability that the second is blue = 5/9(a reduction in the total number of marbles, because after the first marble was picked it wasn't replaced)
Probability of 1st and 2nd being red and blue respectively = 2/10 × 5/9
=1/9....
Hope this helped...?
??? 4.222 and it is also different Bible like this
To solve this problem, we must assume that the man
undergoes constant acceleration as he goes down the river (therefore no other forces
must act on him except gravity). Therefore we can use the formula below to
calculate for the duration of his fall:
y = y0 + v0 t + 0.5 a t^2
where y is the distance and y0 = 0 since we set the
reference point at the bridge, v0 is the initial velocity and is also equal to
v0 = 0 since the man started from rest, therefore the equation becomes:
y = 0 + 0 t + 0.5 a t^2
y = 0.5 a t^2
Rewriting in terms of t:
t^2 = 2 y / a
t = sqrt (2y / a)
a is acceleration due to gravity = 9.8 m/s^2
t = sqrt [2 * 23 / 9.8]
t = 2.17 s
Therefore the jump last only about 2.17 seconds.
Answer:
222 [ft²].
Step-by-step explanation:
1. the required area can be calculated according to the formula:
A=0.5*b*c*sin(A);
2. after substitution of b=32; c=19 and sin(A)≈0.7313537:
A=0.5*32*19*0.7313537=222.3315248 [ft²].
Answer: Russia earned 13 gold medals, 11 silver medals and 9 bronze medals.
Step-by-step explanation:
Let x represent the number of gold medals that Russia earned.
Let y represent the number of silver medals that Russia earned.
Let z represent the number of bronze medals that Russia earned.
Russia earned a total of 33 medals. This means that
x + y + z = 33 - - - - - - - - - - - 1!
In the 2014 winter olympics in sochi russia earned 4 more gold medals than bronze. This means that
x = z + 4
The number of silver medals earned was 7 less than twice the number of bronze. This means that
y = 2z - 7
Substituting x = z + 4 and y = 2z - 7 into equation 1, it becomes
z + 4 + 2z - 7 + z = 33
4z - 3 = 33
4z = 33 + 3 = 36
z = 36/4 = 9
x = z + 4 = 9 + 4
x = 13
y = 2z - 7 = 2 × 9 - 7
y = 11
