Answer:
6 red balls
Step-by-step explanation:
The probability in the first pick
6/21
The probability in the second pick (without replacement)
5/20
the requested probability
(6/21)(5/20) = 30/420
simplification
30/420 = 3/42 = 1/14
Hope this helps
Answer:
Step-by-step explanation:
A= πr2 = π·72 ≈153.93804
Step-by-step explanation:
7^2+8^2=113
Then square root 113 which is 10.63 to 2.d.p
So x=10.63
Answer:
24
Step-by-step explanation:
k = t - 5k
→ Substitute in k
4 = t - 20
→ Add 20 to both sides
24 = t
