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Byju's Answer
Standard XII
Mathematics
Permutation: n Different Things Taken All at a Time When All Are Not Different.
If 33+45=30...
Question
If
33
+
45
=
30
,
90
+
26
=
40
then,
30
+
45
=
?
A
15
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B
14
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C
16
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D
18
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Solution
The correct option is
A
15
Step 1:
3
+
3
+
4
+
5
=
15
again,
1
+
5
=
6
Finally
6
×
5
=
30
Step 2:
9
+
0
+
2
+
6
=
17
Again,
1
+
7
=
8
Finally
8
×
5
=
40
Step 3:
3
+
0
+
4
+
5
=
12
Again,
1
+
2
=
3
Finally
3
×
5
=
15
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0
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