Read the following question and decide which of the given statements is/are sufficient.
In a class of 50 students, how many girls scored above 80% in Maths?
Statements:
1. Exactly four boys scored above 80% in Maths.
2. One-third of the class scored above 80% in Maths.
A.
Both 1 and 2 together are sufficient to answer the question.
B.
2 alone is sufficient while 1 alone is not sufficient to answer the question.
C.
1 alone is sufficient while 2 alone is not sufficient to answer the question.
D.
Either 1 or 2 is sufficient to answer the question.
Type 1 workers are 2.5 times as efficient as Type 2 workers. Twelve Type 1 workers can complete a task in 10 days. How many days would it have taken 4 Type 1 and 15 Type 2 workers to do the same work?