A. student multiplied a number by 53instead of 35 . What is the percentage of error in the calculation?
Bus fare recently has increased from taka 0.85 to taka 1.00. What was the approximate percentage of increase?
(.15/.85)*100 %=17.64%
The ratio of boys to girls in a class is 25. If 2 boys leave and 4 girls join the class. The ratio of the boys to the girls become 14. Originally, how many girls were in the class?
B=2x and G=5x. Now,2x-2 / 5x+4 = 1 /4
8x-8 = 5x+4
x=4
then,B=2*4=8
G= 5*4=20
If x2+y2+z2=5 and x+y-z=3 then what is the value of yz+zx-xy=?