Answer:
21 pacientes tienen problemas cardíacos de los 70 pacientes diagnosticados
Step-by-step explanation:
Paciente con problema cardíaco del total de pacientes diagnosticados = 30%
Total de pacientes que van al hospital en un día = 70
El total de pacientes con problemas cardíacos entre los 70 pacientes diagnosticados es
30% de 70 = 30/100 * 70 = 21
12×12 squared is = 12•144/=
1728
If you need a better explanation just ask in the comments.
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The order of the 3 books does not matter so its the number of combinations of 3 from 45
b is the correct choice