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julia-pushkina [17]
3 years ago
10

A school libary has 260 dvds in its collection. Given that 45% of the dvdas are science and 40% are about history. How many of t

he dvds are about other subjects?
Mathematics
2 answers:
Darina [25.2K]3 years ago
8 0

Answer:

39 DVDs

Step-by-step explanation:

45% of 260

45/100 ×260

117 DVDs of science

40% of 260

40/100 × 260

104 DVDs of history

So from total subjects science and history

260 - (104+117)

260 - 221

39 DVDs of other subjects

In an easiest way 40 + 45

85% of science and history

So 15 % of other subjects

15/100 × 260

39 DVDs

marshall27 [118]3 years ago
5 0

Answer:

There are 39 dvds of other subjects

Step-by-step explanation:

science= 45% of 260

=\frac{45}{100}*260=9*13=117\\\\History=\frac{40}{100}*260=104\\\\\\Othersubjects=260-(117+104)=260-221=39

OR

100 - (45+40)= 100- 85 = 15%

Other subjects = 15% of 260

=\frac{15}{100}*260=3*13=39

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