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a group of n stations share a 100kbps pure aloha channel .each station outputs a 1000B  frame on average every 50 sec . the maximum value of N?

answer given as  920 but i am getting 115

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me too getting 115
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I am also getting 115. Maybe ans. given is wrong. Can someone else verify ?
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what is the procedure can you tell me ??
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WHICH PROCEDURE?

I USED

N*THROUGHPUT OF EACH STATION = AVAILABLE BANDWIDTH
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@Magma

Tt = 0.08

so in 50 sec 1 frame transmitted so in o.o8 sec ,  0.08/50  = 0.0016 frame transmitted

so our G = 0.0016

now use formula , N   *  G*e^-2G = 0.184

coming N = 115

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@Manas

From where you got 0.184 ???

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@Magma

efficiency of pure aloha is 18.4 %

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thanks ...

actually I forgot that part