The average of five numbers is 46. If the average of the last 4 number

1.	The average of five numbers is 46. If the average of the last 4 numbers is 45,then which is the first number ?
Answer» Answer: let the numbers be a,b,c,d,e,f Step-by-step explanation: given a+b+c+d+e/5 =46 _equation 1 then a+b+c+d+e=230 and given b+c+d+e/4=45 b+c+d+e=180_equation 2 then subtracting EQUATION 2 from equation 1 a+b+c+d+e-b-c-d-e=230-180 then a=50 hence first NUMBER is 50

The average of five numbers is 46. If the average of the last 4 numbers is 45,then which is the first number ?

Answer»

Answer:

let the numbers be a,b,c,d,e,f

Step-by-step explanation:

given a+b+c+d+e/5 =46 _equation 1

then a+b+c+d+e=230

and given

b+c+d+e/4=45

b+c+d+e=180_equation 2

then

subtracting EQUATION 2 from equation 1

a+b+c+d+e-b-c-d-e=230-180

then a=50

hence first NUMBER is 50