ans: Total sales taka 32,500.
Let, total sales be tk. x
According to question.
x – [ 5% of 10000 + 4% of (x – 10000)] = 31100
x-[$\frac{5}{100}\times 10000+\frac{4}{100}$(x – 10000)] = 31,100
x = 32,500
ans: 13.5
Let, the price per kg of another lot of 30kg rice is Tk. x
Here CP of first lot of 30kg rice is Tk. (30 x 17.50) = 525 Tk.
Here CP of first lot of another rice is Tk. (30 $\times$ x) = 30x Tk.
Total cost price of the two lots is Tk. = 525 + 30x
S.P ofthe total rice is Tk. (60 x 18.6) = 1116 Tk.
So, we can write 120% of (525 + 30x) = 1116
=> $\frac{120}{100}$(525+30x) = 1116
=> x = 13.5
ans: 78%.
Let, the number of boys and girls be 3x and 2x respectively
Total students = 3x + 2x = 5x
The number of boys who are scholcrship holder = 3x $\times$ 20% = $\frac{3x}{5}$
The number of girls who are scholcrship holder = 2x $\times$ 25% = $\frac{2x}{4}$
The number of students who does not get scholcrship = 5x – ($\frac{3x}{5}$ +$\frac{2x}{4}$) = $\frac{78x}{20}$
% of students who does not get scholarship = $\frac{\frac{78x}{20}}{5x}$ x 100 = 78%.
