Total students not enrolled in either course = Total students - (Students taking French + Students taking German - Students taking both)
Total students = 78
Students taking French = 41
Students taking German = 22
Students taking both = 9
Total students not enrolled in either course = 78 - (41 + 22 - 9) = 16 students.
Total students = 78
Students taking french = 41
Students taking German = 22
Students taking both french and german = 9
Students taking only french = 41–9= 32
Students taking only german = 22–9 = 13
Thus students taking only french or german or both = 13+32+9= 54
So students taking neither french or german = 78 — 54= 24
Say is the original price of an orange and n is the number of orange can buy at 12 tk, then:
;
and
New price 0.6x and new orange quantity n+4
Then, -->
-->
-->
-->
.
So, for 24tk, 24/2=12 oranges can be purchased at the original price of 2tk
Related Question
View Allx + 1/x = 3
⇒ x2+ 1/x = 3
⇒ x2 + 1 = 3x
⇒ x2 - 3x + 1 = 0
⇒ x2 -3 . x . 1 + 12 = 0
⇒ (x-1)2 = 0
⇒ x - 1 = 0
x = 1
প্রদত্ত রাশি,
x9 + 1/x9
= 19 + 1/19
= 1 + 1/1
= 1 + 1/1
= 2/1
= 2 (Answer)
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