Question

On January 1st, 2010 the average age of 11 members of a cricket team was 30 years. After four years, aplayer X from the team was replaced by another players Y After one more year, player Y was replaced byanother player Z, as a result of which the average age of the team then became 34411 years. If the age of11player Y is 4 years less than that of player X, then the age of player Z is how many years more/less thanthat of player Y?

Answer 1

Let the marked price be x.

Given cost price = 900.

Given that gain = 10%.

SP = 900 + 10% of 900

     = 900 + 10/100 * 900

     = 900 + 90

     = 990.

Given that Discount = 10%.

SP = markedprice - 10% of 100

SP = x - 10/100 * 100

990 = x - 0.10x

990 = 0.9x

x = 1100.

The marked price = 1100.

Hope this help you..

Answer 2

$\huge{\bold{ </u><u>Solut</u><u>ion</u><u>:</u><u>-</u><u>}}$

$let \: the \: marked \: price \: be \: x \\ \\ {\purple{\boxed{\large{\bold{given}}}}} \\ \\ cost \: price \: = 900 \\ gain = 10 \\ \\ sp = 900 + 10 \: of \: 900 \\ \\ = 900 + \frac{10}{100} \times 900 \\ \\ = 900 + 90 \\ \\ = 990 \\ \\ discount \: = 10 \\ \\ sp = marked \: price \: - 10 \: of \: 100 \\ \\ 990 = x - \frac{10}{100} \times 100 \\ \\ 990 = x - 10 \\ \\ x - 10 = 990 \\ \\ x = 990 + 10 \\ \\ x = 1000$