A chain of video stores sells three different brands of DVD players. Of its DVD sales, 50% are brand A (least expensive), 30% are brand B, and 20% are brand C. Each manufacturer offers a one-year warranty on parts and labor. It is known that 25% of brand A DVD players require repair work under warranty, whereas brand B DVD players require 20% warranty repair work and brand C DVD players only require 10% warranty repair work . Suppose we randomly select a single purchased DVD player out of all players purchased, what is the probability that it is both a Brand A player and required repair work under warranty. [Write as a decimal and round to two decimal places]

the final price would be 29.6925

step-by-step explanation:

39.59 minus 25% equals 29.6925

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.

, 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