Answer:
Solution given:
ratio of boys to the girls=5:3
let ratio be 5x and 3x
we have
5x+3x=40
8x=40
x=40/8
x=5
5x=5*5=25
3x=3*5=15
No of boys=25
No of girls=15
Not quite sure what you are asking...
t stands for time in this formula
if you are trying to solve for t it would be t=d/r or time equals distance divided by rate
hopefully this helps! if not please let me know.
Answer:
m=5/3
Step-by-step explanation:
Answer:
The expected value is 0
Game is fair
Step-by-step explanation:
Probability = required outcome / Total possible outcomes
Number of red cards = 26
Numbw rof black cards = 26
Total number of cards = 52
If a red card is chosen, amount paid is doubled
If a black card is chosen, no winning or amount is collected.
Net money won or lost on choosing a red card = ($2 - $1) = $1
Net amount won on choosing a black card = $0 - $1 = - $1
P(red) = 26 /52 = 1/2
P(blue) = 26 /52 = 1/2
Expected value (E):
E = x*p(x)
E(X) = (1/2 * 1) + (1/2 * - 1)
E(X) = 1/2 - 1/2 = 0
Hence, since the expected value is 0 ; then the game is fair
