Question

test consists of 6 multiple choice questions,

each having 4 alternative answers of which

only one is correct. The number of ways, in

which a candidate answers all six questions

such that exactly four of the answers are

correct, is _​

Answer 1

Answer:

135

Step-by-step explanation:

please mark as brainliest if the answer is correct ☺️

Answer 2

Given : test consists of 6 multiple choice questions, each having 4 alternative answers of which  only one is correct.

To Find : The number of ways, in  which a candidate answers all six questions  such that exactly four of the answers are  correct,

Solution:

exactly four of the answers are  

correct,

Selecting 4 answers out of 6   , correct choice is 1

⁶C₄  x 1 =  15  

in remaining 2 answers  Wrong choices are 3 in each

hence 3 x 3  = 9 ways

Total Ways  = 15 x 9  = 135

135  number of ways, in  which a candidate answers all six questions  such that exactly four of the answers are  correct,

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