Question

Rohit notebook for rupees 23.75 a pencil for Rupees 2.85 and a pen for rupees 15. 90 he gave a 50 rupees note to the shopkeeper what amount did he get back​

Answer 1

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$\rm{Cost \: \: \: of \: \: \: a \: \: \: notebook = Rs. \: 23.75} \\ \\ \\ \rm{ \: \: \: \: \: \: Cost \: \: \: of \: \: \: a \: \: \: pencil = Rs. \: 2.85} \\ \\ \\ \rm{ \: \: \: \: \: \: \: \: \: \: \: Cost \: \: \: of \: \: \: a \: \: \: pen = Rs. \: 15.90}$

$\rm{ \therefore \: \: Total \: \: \: cost \: \: \: of \: \: \: the \: \: \: notebook \: ,\: \: pencil } \\ \\ \rm{ \: \: \: \: \: and \: \: \: pen = Rs. \: (23.75 + 2.8 5+15.90 }) \\ \\ \rm{ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = Rs. \: 42.50}$

$\rm{Rohit \: \: \: gave \: \: \: the \: \: \: shopkeeper \: = Rs. \: 50.00} \\ \\ \rm{ \therefore \: \: The \: \: amount \: \: \: that \: \: \: Rohit \: \: \: get} \\ \\ \rm{ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: back \: \: \: is \: \: = \: Rs. \: (50.00 - 42.50)} \\ \\ \rm{ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \: \underline{ \: \: \: Rs. \: 7.50 \: \: \: }}$

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$\sf{The \: \: amount \: \: that \: \: rohit \: \: get \: \: back \: \: from \: \: the}$

$\sf{shopkeeper \: \: is \: \: = \underline{ \red{ \: \: Rs. \: \: 7.50 \: \: }}}$

Answer 2

Step-by-step explanation:

Cost of a notebook=Rs.23.75

Cost of a pencil=Rs.2.85

Cost of a pen=Rs.15.90

∴Total cost of the notebook ,pencil

and pen=Rs.(23.75+2.85+15.90)

=Rs.42.50

Rohit gave the shopkeeper=Rs.50.00

∴The amount that Rohit get

back is=Rs.(50.00−42.50)

=

Rs.7.50