A mobile app was tested 600 times before its release. The testing was done in 3
stages of 200 tests each. The app failed 30 times in Stage I, 24 times in Stage II, 16 times in
Stage III, 12 times in both Stage I and Stage II, 14 times in both Stage II and Stage III, 8
times in both Stage I and Stage III, and 8 times in all the three stages. How many times the
app failed in a single stage only?
A. 24
B. 70
C. 26
D. 52
Answer & Explanation ?
Answers
Answer:
Step-by-step explanation:62
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26 app failed in a single stage only
Step-by-step explanation:
A mobile app was tested 600 times before its release
Failed in stage 1 = 30
Failed in stage 2 = 24
Failed in Stage 3 = 16
Failed in both Stage I and Stage II = 12
Failed in both Stage II and Stage III = 14
Failed in both Stage I and Stage III = 8
Failed in all three Stages = 8
Failed in stage I only = Stage I - (Stage I and Stage II ) - (Stage I and Stage III ) + Failed in all three Stages
= 30 - 12 - 8 + 8
= 18
Failed in Stage II only = 24 - 12 - 14 + 8 = 6
Failed in Stage III only = 16 - 14 - 8 + 8 = 2
app failed in a single stage only = 18 + 6 + 2 = 26
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