Answer:
- 85
Step-by-step explanation:
The n th term of a geometric series is
= a
where a is the first term and r the common ratio
1 ← is the n th term of a geometric series
with a = 1 and r = - 2
The sum to n terms of a geometric series is
=
=
=
=
= - 85
Answer: The required probability is
Step-by-step explanation:
Since we have given that
Number of spruce tree = 20
Number of maple tree = 50
Total trees = 70
We need to find the experimental probability that the next tree Colleen to get a spruce tree.
So, the probability would be :
Hence, the required probability is