The value of \(\left(\frac{\frac{8}{3}\div\frac{3}{5}\times\frac{7}{5}}{\frac{5}{3}\div\frac{5}{7}\times\frac{8}{9}}\right)\div9\)
\( \frac{1}{3} \)
\( \frac{3}{5} \)
\( \frac{2}{3} \)
\( \frac{1}{5} \)
The sum of the salaries of A and B together is ₹4,300. A spends 95% of his salary and B, 80% of his salary. If their savings are the same, what is A's salary?
Calculate the standard deviation for the following data.
3, 4, 5, 6, 7