p-q=1
q-p=0
p+q=1
p+q=0
Correct answer is C
No explanation has been provided for this answer.
\(\frac{2}{11}\)
\(\frac{5}{12}\)
\(\frac{8}{12}\)
\(\frac{7}{11}\)
Correct answer is A
Total number of balls = 5 + 3 + 4 = 12 balls
P(one ball is green and the other is blue) = P(first ball is green and second blue) + P(first ball is blue and the second green)
= \(\frac{3}{12} \times \frac{4}{11} + \frac{4}{12} \times \frac{3}{11}\)
= \(\frac{2}{11}\)
\(\frac{5}{33}\)
\(\frac{5}{36}\)
\(\frac{103}{132}\)
\(\frac{31}{36}\)
Correct answer is A
Total number of balls = 5 + 3 + 4
= 12 balls
P(first ball is red) = \(\frac{5}{12}\)
P(second ball is red) = \(\frac{4}{11}\)
\(\therefore\) P(both balls are red) = \(\frac{5}{12} \times \frac{4}{11}\)
= \(\frac{5}{33}\)
Express 25° 45' in decimal (Hint: 1° = 60')
25.75o
25.55o
25.45o
25.15o
Correct answer is A
25° 45' = 25° + \(\frac{45}{60}\)°
= 25° + 0.75°
= 25.75°
5.0km
7.5km
7.6km
8.7km
Correct answer is D
\((PR)^2 = (PQ)^2 + (QR)^2\)
\(10^2 = 5^2 + (QR)^2\)
\((QR)^2 = 100 - 25\)
\(QR = \sqrt{75}\)
= \(8.660\)
\(\approxeq\) 8.7 km