The half-life of a radioactive kind of tellurium is 40 minutes. How much will be left after 360 minutes if we
2 answers:
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Answer:
(C)81
Step-by-step explanation:
Total Number of Students =300
Percentage who had cats, n(C) = 40%
Percentage who had both cats and dogs , = 12%
Percentage who had neither cats nor dogs, =45%
Now:
Universal Set,
Therefore:
Number of Students who had dogs
=27% of 300
=81