Question

a person spends on the average rupees 18 in 4 days he spend Rupees 15 on first day and 12.60 on second day if he spends rupees 25 on 3rd day find his expenditure on the fourth day​

Answer 1

Answer:

Rs 19.4

Step-by-step explanation:

Average spend of 4 days = Rs 18

total spend of 4 days = 18 × 4 = Rs 72

Spend on 1st Day = Rs 15

Spend om 2nd day = Rs 12.6

Spend on 3rd Day = 25

Let say spend on 4th day = Rs X

then total spend of 4 days = Spend on Day 1 + Day 2 + Day 3 + Day4

total spend of 4 days  = 15 + 12.6 + 25 + X

= 52.6 + X  Rs

52.6 + X = 72

X = 72 - 52.6

X = 19.4 RS

his expenditure on the fourth day​ = Rs 19.4

Answer 2

Let the money he spend on 4th day be x.

Now,

Average = (15+12.60+25+x)/4

=> 18 = (52.60+x)/4

=> 18 X 4 = 52.60+x

=> 72 = 52.60+x

=> 72-52.60=x

=> x=19.4

Hence, he spend Rs. 19.40 on 4th day.

:)