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In a class of 30 students, 10 got A on the first test, 9 got A on a second test, and 15 did not get an A on either test.
By Quinn

In a class of 30 students, 10 got A on the first test, 9 got A on a second test, and 15 did not get an A on either test.

Find: the number of students who got:

(b) an A on the first test but not the second​

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Quinn

यदि एक बारम्बारता बंटन का माध्य 8.1 है तथा
म. = 132 + 5k, E/ = 20 है तो k का मान ज्ञात कीजिए।
AC-​

find the half range sine series for the function f(x) =xcosx in the interval​

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