Question

The sum of five numbers is 555. The average of the first two is 75 abd the third number is 115. what is the average of last two numbers​

Answer 1

Answer:

average of last two numbers = 145

Step-by-step explanation:

sum of five numbers = 555

as we know that

average=(sum of numbers)/(no of numbers)

average of first two numbers

sum of first two numbers/2

let the sum of first two numbers be x

x/2=75

x=150

sum of first two numbers = 150

third number =115

sum of last two numbers=

sum of all five numbers-sum of first two numbers+ third number

sum of last two numbers=

555-(150+115)

555-265

290

average of last two numbers=

sum of last two numbers/2

290/2=145

there fore average of last two numbers=145

Answer 2

Answer:

145

Step-by-step explanation:

Let the five numbers be A,B,C,D,E

Given, A+B+C+D+E=555

(A+B)/2=75⇒A+B=150 and C=115

∴150+115+D+E=555

⇒D+E=555−265=290

∴ Required Average =(D+E)/2=290/2=145