Question

the probability of guessing the correct ans to a certain qusetion is × by 7 if the probability of guessing the wrong ans 3by21 find x
​

Answer 1

Answer:

Step-by-step explanation:

Probability of guessing wrong answer = 3/21 = 1/7.

Thus probability of guessing correct answer = 1 - 1/7 = 6/7.

Comparing 6/7 with x/7,

The value of x = 6.

Answer 2

$\large { \fcolorbox{gray}{black}{ ✔\: \textbf{Verified \: answer}}}$

Value of x is 6

Answer 3

$\large { \fcolorbox{gray}{black}{ ✔\: \textbf{Verified \: answer}}}$

Value of x is 6