Question

There are $7$ horses in a race, Mr. X selected $2$ horses at random and bet on them. The probability that Mr. X selected the winning horse, is

• A. $1/7$
• B. $4/7$
• C. $3/7$
• D. $2/7$

Answer 1

Answer: (D)

$2/7$

Answer 2

$\therefore$ Required probability
$=\frac{^{1}{{C}_{1}}{{\times }^{6}}{{C}_{1}}}{^{7}{{C}_{2}}}$
$=\frac{6}{21}=\frac{2}{7}$