Answer:
3n + 5
Step-by-step explanation:
what do u mean by is it true or false?
5 red, 15 blue, 5 green....total of 25 marbles
probability that one is red : 5/25 = 1/5
replaces it
probability that one is blue : 15/25 = 3/5
probability of both : 1/5 * 3/5 = 3/25 = 0.12 = 12% <==
Answer:
2/6561
Step-by-step explanation:
Geometric sequence formula :
where an = nth term, a1 = first term , r = common ratio and n = term position
given ratio : 1/3 , first term : 2 , given this we want to find the 9th term
to do so we simply plug in what we are given into the formula
recall formula :
define variables : a1 = 2 , r = 1/3 , n = 9
plug in values
a9 = 2(1/3)^(9-1)
subtract exponents
a9 = 2(1/3)^8
evaluate exponent
a9 = 2 (1/6561)
multiply 2 and 1/6561
a9 = 2/6561