Bello chooses a number randomly from 1 to 10. What is the probability that it is either odd or prime?
A
\(\frac{1}{10}\)
B
\(\frac{2}{5}\)
C
\(\frac{1}{2}\)
D
\(\frac{3}{5}\)
E
\(\frac{9}{10}\)
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
the numbers from 1,2,3,4,5,6,7,8,9,10. n( total numbers) = 10
the odd numbers are 1, 3, 5, 7, 9 n( odd) = 5
the prime numbers are 2, 3, 5, 7 n( prime) = 4
but total favourable outcome = ( 1,2,3,5,7,9) = 6
Pro( odd or prime no) = \(\frac{6}{10}\) = \(\frac{3}{5}\)
Source: WAEC / JAMB / NECO Classroom Archive (Record #42655)