There are 18 mathematics majors and 325 computer science majors at a college. a. in how many ways can two representatives be picked so that one is a mathematics major and the other is a computer science major? b. in how many ways can one representative be picked who is either a mathematics major or a computer science major?

Step-by-step explanation:

Given

There are 18 Mathematics Majors and 325 computer science majors at a college

(A)Two Representative to be selected

no of ways in which 1 representative of Mathematics major can be selected is

no of ways in which 1 representative of Computer science major can be selected is

Total no of ways

(b)No of ways in which either a Mathematics or computer science major can be selected is

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

hiking down a winding trail.

step-by-step explanation: