Answer:
ŕtyytuu6544789mz.8866790977
Answer:
3/10
Step-by-step explanation:
There are totally 5 disks. On the first pick, there are 3 red discs. So
P(red disc on first pick ) = 3/5
Assuming that a red disc has been picked the first time, there will be 2 red discs and 2 blue discs so
(P red disc on second pick given red disc on first pick) = 2/4
P(red disc on both picks) = 3/5 x 2/4 = 3/10
As order is not important in this problem, we make use of the concept of Combination. A group of 5 people should be picked out of the 8. In mathematical notation, the possible combinations (P) is 8C5. This is equal to 56. Thus, there are 56 different ways to which 5 people can be selected.
Answer: 14 - 5i
Step-by-step explanation:
Answer:
Tn= -2n +29
Step-by-step explanation:
The terms decreases by 2 from the previous term. Hence they have a common difference of -2.
Tn= a +d(n-1), where a is the 1st term and d is the common difference.
When d= -2, a=27,
Tn= 27 -2(n-1)
Tn= 27 -2(n) -2(-1) (expand)
Tn= 27 -2n +2
Tn= -2n +29 (simplify)
Let's check!
When n=3,
T₃= -2(3) +29
T₃= 29 -6 (expand)
T₃= 23 (simplify)
✓ This is correct as the 3rd term in the sequence is 23.
