In a school, 220 students offer Biology or Mathematics or...
In a school, 220 students offer Biology or Mathematics or both. 125 offer Biology and 110 mathematics. How many offer Biology but not Mathematics?
95
80
125
110
Correct answer is D
Hint: Represent the question in a venn diagram, such that
n(B ∩ M) = x
n(B) only = 125-x
n(M) only = 110-x
=> 125-x + 110-x + x = 220
=> x = 15.
n(B) only = 125 - 15 = 110
If log7.5 = 0.8751, evaluate 2 log75 + log750 ...
Find the 6th term of the sequence \(\frac{2}{3} \frac{7}{15} \frac{4}{15}\),......
If c and k are the roots of 6 - x - x2 = 0, find c + k...
\(\begin{array}{c|c} Marks & 2 & 3 & 4 \\ \hline Frequency & 4 & 4 & y \end{array}\) The t...
What is the least possible value of \(\frac{9}{1 + 2x^2}\) if 0 \(\geq\) x \(\geq\) 2?...
Simplify: (\(\frac{3}{4} - \frac{2}{3}\)) x 1\(\frac{1}{5}\)...