If A = 30°, what is the value of:
\(
\frac{ \big[ 8 \sin A + 11 \,\mathrm{cosec}\, A - \cot^{2} A \big] }{ 10 \cos 2A }
\)
The following histogram shows the marks scored by 40 students in a test of 30 marks. A student has to score a minimum of 10 marks to pass the test. What is the percentage of students who passed the test?
Performance of 1800 students in grades has been shown in the following pie charts.
The number of students getting grade B is what percentage of the number of students getting grade A?