1you've taken H-2 and T-1 ???
If ‘head’ means one and ‘tail’ means two , then coefficient of quadratic equation
ax2 + bx + c = 0 are chosen by tossing three fair coins. Then find the probability that roots of the equations are imaginary.
jaldi post karna poora solution ke saath
-
UP 0 DOWN 0 0 3
3 Answers
106head - 1
tails - 2
CASES..
HHH or 111 here D<0 so imaginary roots
HHT or 112 here D<0
HTH or 121 here D=0
HTT or 122 here D<0
THH or 211 here D<0
THT or 212 here D<0
TTH or 221 here D<0
TTT or 222 here D<0
Now probability of HTH = 1/8..
So probablity of imaginary roots = 1-1/8 = 7/8?