{17}
{16, 17, 19, 20}
{1, 4, 15, 17, 18}
{14, 15, 16, 18, 19, 20}
{14, 15, 16, 17, 18, 19, 20}
Correct answer is D
U = {14,15,16,17,18,19,20}
J' = {14,15,17,18}
K' = {16,17,19,20}
(J' \(\cap\) K') = {17}
(J' \(\cap\) K')' = {14,15,16,18.19,20}
Two fair coins are tossed at the same time. what is the probability of getting a head?
1
\(\frac{3}{4}\)
\(\frac{1}{2}\)
\(\frac{1}{3}\)
\(\frac{1}{4}\)
Correct answer is E
No explanation has been provided for this answer.
If t varies inversely as the cube of s, and t = 24, when s = 3, find t when s = 2
8
24
27
81
648
Correct answer is D
No explanation has been provided for this answer.
85.7°
47.5°
41.4°
38.2°
Correct answer is B
using cosine rule,
\(cos\theta\) = \(\frac{28^2 + 15^2 - 21^2}{2\times28\times15}\)
= \(\frac{568}{840}\)
\(\theta = cos^{-1}\)
= 47.5°
If sin θ = 4/5 where 0° ∠ θ ∠ 900, what is the value of cos θ + tan θ?
\(\frac{14}{15}\)
\(\frac{29}{15}\)
\(\frac{13}{8}\)
\(\frac{144}{15}\)
\(\frac{24}{5}\)
Correct answer is B
No explanation has been provided for this answer.