Consider n(U) = 80. n(A) = 40. n(B) = 55 and $n(A \cap B)$ = 20 . Then the value of $n(A\oplus B)$ is:
1). 25
2). 55
3). 45
4). 35
The lenstli of the shortest distance between the lines $\frac{x-1}{2}=\frac{y-2}{3}=\frac{z-3}{4}$ and $\frac{x-2}{3}=\frac{y-4}{4}=\frac{z-5}{5}$ is :
1). $\frac{2}{3\sqrt{6}}$
2). $\frac{1}{\sqrt{6}}$
3). $3\sqrt{30}$
4). 1$3\sqrt{66}$
The mode of the numbers 25, 15, 23, 40, 27, 25. 23, 25, 20 is :
1). 13
2). 24.8
3). 24.7
4). 25
The largest term in the Binomial expansion of $(3+2x)^{50}$ , When $x=\frac{1}{5}$, is :
1). Third term
2). Eighth term
3). Sixth term
4). Fifth term
For which value of k.the points $(k, 2-2k), (-k+1,2k) and (-4-k,6-2k)$ are collinear ?
1). 2
2). 0.5
3). -1
4). 1