50 red cars and 30 white and 20 blue what is the probability of 2 cars from the same colors ?
10
Your question is incomplete.
Are you choosing 2 cars ? It doesn't say.
Assume we are choosing 2 cars and you want the prob that they are both of the same colour.
The could be RR or WW or BB
prob(RR) = C(50,2)/C(100,2) = 1225/4950 = 49/198
prob(WW) = C(30,2)/C(100,2) = 435/4950 = 29/330
prob(BB) = C(20,2)/C(100,2) = 190/4950 = 19/495
sum of those = 37/99
prob of same colour = 37/99
KISSME DO YOU LOVE ME
To calculate the probability of selecting two cars of the same color, we need to determine the total number of possible pairs of cars and the number of pairs of cars of the same color.
First, we find the total number of possible pairs of cars.
Since there are 50 red cars, 30 white cars, and 20 blue cars, the total number of possible pairs is calculated by:
Total number of possible pairs = (number of red cars) * (number of red cars - 1) + (number of white cars) * (number of white cars - 1) + (number of blue cars) * (number of blue cars - 1)
Total number of possible pairs = (50) * (49) + (30) * (29) + (20) * (19)
= 2450 + 870 + 380
= 3700
Next, we find the number of pairs of cars of the same color.
For red cars, there are 50 cars, so we need to select 2 cars from the 50. This can be calculated using the combination formula:
Number of pairs of red cars = (number of ways to select 2 cars from 50 red cars)
Similarly, we need to calculate the number of pairs for white cars and blue cars.
Finally, we sum up the number of pairs for each color to get the total number of pairs of cars of the same color.
Once we have the total number of pairs of cars of the same color and the total number of possible pairs, we can calculate the probability:
Probability = (total number of pairs of cars of the same color) / (total number of possible pairs)
I will now calculate the values to determine the probability.