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I am trying to write this equation in latex but couldn't accomplish it. Can someone help me?

enter image description here

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1  
can you give an example of what you have tried and what you are having issues with. – mythealias Nov 4 '12 at 0:37
What seems to be the problem with the equation? – Gonzalo Medina Nov 4 '12 at 0:37
9  
Please don't ask questions "please do this for me" (see your question history). Show, what you have done til now and describe excactly what's the problem. – Kurt Nov 4 '12 at 0:46
1  
This question will be closed as too localized. It can be reopened if you would modify it so that it shows a real problem. – Stefan Kottwitz♦ Nov 4 '12 at 1:08

closed as too localized by Qrrbrbirlbel, Gonzalo Medina, Stefan Kottwitz♦ Nov 4 '12 at 1:08

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, see the FAQ.

2 Answers

up vote 3 down vote accepted 
\documentclass{minimal}

\begin{document}
\[\frac1b\sum_{i=1}^b\biggl[0.632\times0.5+0.368\times1\biggr]=0.684.\]
\end{document}

I'd like to know where you had a problem, though...

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I get an error when I execute the above code. – Vutukuri Nov 4 '12 at 0:56
@Vutukuri That code works without error for me. Perhaps tell us what error message you got. – Stefan Kottwitz♦ Nov 4 '12 at 0:59
It's working fine.Thank you. :-) – Vutukuri Nov 4 '12 at 1:26
up vote 5 down vote 
\documentclass{article}

\begin{document}

\[
  \frac{1}{b}\sum_{i=1}^b
  \left[\vphantom{\frac{1}{b}}
    0.632 \times 0.5 + 0.368 \times 1 
  \right] = 0.684
\]

\end{document}

The only problem is to determine the size of the brackets. From the sample it seems that in this case the size is given by the fraction before the summation. The solution is based on using \vphantom,

which makes an invisible box whose height and depth are the same as those of the corresponding \phantom, but the width is zero (Knuth, TeX Book)

enter image description here

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1  
Please refrain from answering questions like this which are overtly not appropriate for our Q&A format -- meta.tex.stackexchange.com/questions/2414/… – doncherry Nov 4 '12 at 5:18

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