A four-digit number is to be formed by using the digits. 2, 4, 7, 8. The probability that the number will start with 7 is
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it will be 2x^2
x=no.of observation from one no. =6
2x^2=2*6*6=2*36=72=total no. of possible outcomes
for 7 to come 7248,7284,7428,7482,7842,7824=6
probability=6/72=1/12
x=no.of observation from one no. =6
2x^2=2*6*6=2*36=72=total no. of possible outcomes
for 7 to come 7248,7284,7428,7482,7842,7824=6
probability=6/72=1/12
aryan04kaushik:
wrong
OK sorry
what is the correct answer do you know
1/4
try again u may get it
I got it
Thnx I made it a lot complex
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