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The average weight of the students in a group was 75.4 kg. Later on, four students having weights, 72.9 kg, 73.8 kg, 79.5 kg and 87.4 kg joined the group. As a result, the average weight of all the students in the group increased by 0.24 kg. What was the number of students in the group, initially?
एक समूह के छात्रों का औसत वज़न 75.4 किलो ग्राम था | बाद में, चार छात्र इस समूह में शामिल हो गए जिनके वज़न क्रमशः 72.9 किलो ग्राम, 73.8 किलो ग्राम, 79.5 किलो ग्राम और 87.4 किलो ग्राम थे | परिणामस्वरूप, इस समूह के सभी छात्रों का औसत वज़न 0.24 किलो ग्राम से बढ़ गया | आरंभ में इस समूह में कितने छात्र थे ?

A

46

B

36

C

50

D

48

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