Abucket contains 3 red balls, 4 yellow balls, and 5 purple balls. one ball is taken from the bucket and is not replaced. another ball is taken from the bucket. what is the probability that the first ball is red and the second ball is purple?

The probabilities are 0.25 and 0.454.

Probability means possibility. It deals with the occurrence of a random event. The value of probability can only be from 0 to 1. Its basic meaning is something is likely to happen. It is the ratio of the favorable event to the total number of events.

Given

A bucket contains 3 red balls, 4 yellow balls, and 5 purple balls.

The probability that the first ball is red and the second ball is purple.

We know the formula

For the first ball is red, then

Total event = 12

Favorable event = 3

For the second ball is purple, then

one ball is taken from the bucket and is not replaced

Total event = 11

Favorable event = 5

Thus the probabilities are 0.25 and 0.454.

More about the probability link is given below.

link

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

21

jk it's 20

step-by-step explanation: