Question

If X and Y are two sets such that X ∪ Y has 18 elements, X has 8 elements and Y has 15 elements ; how many elements does X ∩ Y have?​
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Answer 1

Answer:

Powder diffraction is a scientific technique using X-ray, neutron, or electron diffraction on powder or microcrystalline samples for structural characterization of materials. An instrument dedicated to performing such powder measurements is called a powder diffractometer.

Step-by-step explanation:

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Answer 2

X has 8 elements
Y has 15 elements
XUY has 18 elements
So X intersection Y have 5 elements