Answer:
The correct answer is: Option: b
b. 15%
Step-by-step explanation:
The probability of correctly guessing at random exactly one answer i.e. we are asked to find the probability of outcome with exactly one " 1 "
Such outcomes are:
{ 10000 , 01000 , 10000 }
i.e. there are exactly three outcomes.
Total number of outcomes= 20
Hence, the probability is:
[tex]=\dfrac{3}{20}\times 100\\\\\\=3\times 5\\\\\\=15\%[/tex]
Hence, the probability of correctly guessing exactly one answer is:
15%
