Question

Eyeglassomatic manufactures eyeglasses for different retailers. They test to see how many defective lenses they made in a time period. Table #4.2.2 gives the defect and the number of defects.

Table #4.2.2: Number of Defective Lenses

Defect type	Number of defects
Scratch	5865
Right shaped – small	4613
Flaked	1992
Wrong axis	1838
Chamfer wrong	1596
Crazing, cracks	1546
Wrong shape	1485
Wrong PD	1398
Spots and bubbles	1371
Wrong height	1130
Right shape – big	1105
Lost in lab	976
Spots/bubble – intern	976

1. Find the probability of picking a lens that is scratched or flaked.
2. Find the probability of picking a lens that is the wrong PD or was lost in lab.
3. Find the probability of picking a lens that is not scratched.
4. Find the probability of picking a lens that is not the wrong shape.

Answer 1

for query in above, comment.

In total, there are 5865+4613 + -ta76=25891 debeça defective temp. ap & ters " scratched or flakeally - # scratches lenses #na Blaked 1 lenses Total no of lenses Total no.ooten 6865 1992 tensen '90346 - 5808. + dieta, 2'90846. + 258912589! " 1398 c) Pę lens is wrong pd or was lost in laby # Fat wrong PD Lenses - 25891 a76 + # Lost in lab - coa 169 3 t h aa? 25891 pq a teasing not scratchedy =arpq news is scratchedy - E1-25891 = 77347 25891 pę a lens is not the wrong shapely = 1-pe reus is of wrong shapely - Ĥ wrong shape leuses # lenses 5865 # scratched d) 25891 1485 -.-'94264 25891