Answer:
= 8/6435
Step-by-step explanation:
Number of black balls = 8
Number of Brown balls = 5
Total number of balls = 8+5 = 13
Pr (8 balls picked at random are black ) =
Number of black balls / Total number of balls.
1st Pr ( 8 balls picked are black) = 8/13
Pr (2nd random pick) = 7/12
Pr (3rd random pick) = 6/ 11
Pr (4th random pick) = 5/10
Pr (5th random pick) = 4/9
Pr (6th random pick) = 3/7
Pr (7th random pick) = 2/6
Pr (8th random pick) = 1/5
Pr (8 balls picked at random are black ) = 8/13 * 7/12 * 6/11 * 5/10 * 4/9 * 3/7 * 2/6 * 1/5
= 8/13 * 7/12 * 6/11 * 1/2 * 4/9 * 3/7 * 1/3 * 1/5
= 8/6435
But pls note, I solved it such that there wasn't a replacement after each pick.
Math is fun
Answer:
I believe it is rational
C.2,3
D. 3,4
Option C:
f(x) = 5x + 7 is the function of the input-output table.
Solution:
Option A: f(x) = 6x + 9
Input x = 1 in the above equation.
f(1) = 6(1) + 9
= 6 + 9
f(1) = 15
But the output is 12 in the table.
So, it is not the function of the table.
Option B: f(x) = 7x + 5
Input x = 1 in the above equation.
f(1) = 7(1) + 5
f(1) = 12
Input x = 5 in the above equation.
f(5) = 7(5) + 5
f(5) = 40
But the output is 32 in the table.
So, it is not the function of the table.
Option C: f(x) = 5x + 7
Input x = 1 in the above equation.
f(1) = 5(1) + 7
f(1) = 12
Input x = 5 in the above equation.
f(5) = 5(5) + 7
f(5) = 32
Input x = 10 in the above equation.
f(10) = 5(10) + 7
f(10) = 57
Input x = 5 in the above equation.
f(15) = 5(15) + 7
f(15) = 82
All outputs are correct for the given input.
Hence it is the function of the table.
Option D: f(x) = 12x + 1
Input x = 1 in the above equation.
f(1) = 12(1) + 1
f(1) = 12
Input x = 5 in the above equation.
f(5) = 12(5) + 1
f(5) = 61
But the output is 32 in the table.
So, it is not the function of the table.
Hence Option C is the correct answer.
f(x) = 5x + 7 is the function of the input-output table.
Answer:
The "difference".
Step-by-step explanation:
In the equation 7-5=2, 2 is the "difference" between those numbers. Be careful when calling it a product though, because a product is the result of a multiplication equation!
*Bonus nonsense: The first number (7 here) is called the minuend, the second number (5 here) is called the subtrahend, and yes, I totally looked that bit up.