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Fynjy0 [20]
4 years ago
11

Three lines form a triangle as shown.

Mathematics
1 answer:
levacccp [35]4 years ago
6 0
Angle at Y = 180-135 = 45, because it divides the straight line XY in two pieces that together should always be 180
Angle at Z = 49, because the angle on the other side of Z is mirrored.
Angle YXZ = 180 - 49 - 45 = 86 because all three angles of a triangle should add up to 180
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Solution:

we are given that

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As we know

6 teacheras can be selected out of 30 teacher in {30}_C_6 ways.

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3 0
4 years ago
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