Question
Express the following complex numbers in polar form and exponential form.
$\frac{1}{1+i}$
$\frac{1}{1+i}$
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$\left[\begin{array}{ll}0 & -1 \\ 0 & -1\end{array}\right]$
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Marks
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$10-20$
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$20-30$
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$30-40$
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$40-50$
|
$50-60$
|
$60-70$
|
$70-80$
|
$80-90$
|
|
No. of students
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$8$
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$10$
|
$15$
|
$25$
|
$20$
|
$18$
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$9$
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$5$
|
probabilities of hitting the target are $\frac{3}{4}, \frac{1}{2}$ and $\frac{5}{8}$. Find the probability that the target
(a)is hit exactly by one of them.
(b) is not hit by any one of them.
(c) is hit.
(d) is exactly hit by two of them.