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Survey IT conducted a survey of employees with 2-3 years of work experience in the IT Industry. Every one of the respondents was proficient in one or more languages Python, C++ and Java.
a) In all there were 80 respondents.
b) 45 respondents were proficient in Python, 42 in C++ and 38 in Java.
c) The average salary of all the respondents was Rs.9.5 lakhs.
d) Fewer than 10 people were proficient in all 3 languages.
e) Among those proficient in exactly two languages, the number proficient in only C++ and Java was 25% less than the number of proficient in only python and C++, which in turn was 50% more than the number proficient in Python and Java.
f) The average salary of the respondents who were proficient in exactly 2 languages was Rs.10 lakhs while that of those who were proficient who in all 3 was Rs. 15.75 lakhs.
Questions:
1) How many respondents were proficient in only Python?
2) How many respondents were proficient in Java but not C++ ?
3) What was the average salary in Rupees of the respondents who were proficient in exactly 1 language?
4) If the average salary of the respondents who were proficient in only Python and Java was Rs.9.4 lakhs and that of the respondents who were proficient in only C++ and Java was Rs.9.2 lakhs, what was the average salary in lakhs of Rupees, of the respondents who were proficient in only Python and C++ ?

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please reset my va sectional 1, it got submitted without any attempts

A purchased 2400 shares for rs 45
each. Face value rs 20 each. Company
declred dividend of 25% of face value
At end of year A sold all share at rs 50
each. A commission was charged @2%
on purchase and sale of shares. Find A
net gain % over the year.?