In a school, there are 35 students in class 2A and 40 in ...
In a school, there are 35 students in class 2A and 40 in class 2B. The mean score for class 2 in an English Literature examination is 60.0 and that for 2B in the same paper is 52.5. Find, to one place of decimal, the mean for the combined classes
2.5
56.0
56.2
56.3
6.5
Correct answer is B
Total score for 2A & 2B = 4200
mean score = \(\frac{4200}{40 + 35}\)
= \(\frac{4200}{75}\)
= 56
A ship sails 6km from a port on a bearing 070° and then 8km on a bearing of 040°. Find the d...
Express \(\frac{2}{x + 3} - \frac{1}{x - 2}\) as a simple fraction...
PQRS is a cyclic quadrilateral. If ∠QPS = 75°, what is the size of ∠QRS?...
Given that 1/3log10 P = 1, find the value of P...
If y = x sinx, find \(\frac{dy}{dx}\)...
Which of these statements about y = 8\(\sqrt{m}\) is correct?...