воскресенье, 9 февраля 2014 г.

IGCSE Mathematics Revision and Help before Cambridge International Examinations

IGCSE Mathematics Help and Revision Guide Cambridge International Prep for Examinations

Number, set notation and language

Use language, notation and Venn diagrams to describe sets and represent relationships between sets.

In a class of 25 members, 15 take history, 17 take geography and 3 take neither subject.
How many class members take both subjects?
 

Let H = set of History students, so n(H) = 15.
Let G = set of Geography students,
so n(G) = 17 and n(H ∪ G) = 22 (since 3 students take neither subject).
Let x represent the number taking both subjects. Now we can draw the Venn diagram.
n(H ∪ G) + n(H ∩ G) = n(H) + n(G)
22 + х = 15 + 17.
 

Полезные ссылки на ресурсы онлайн репетитора:

Частные уроки разговорного английского языка. SAT, SSAT, IELTS, GMAT.
english-a-repetitor.blogspot.com
GMAT Math Problem Solving : Practice Tests and Information
Practice your math problem solving skills with our 10 tests.
GMAT is a registered trademark of the Graduate Management Admission Council, which was not involved in the production of, and does not endorse, this product.
gmat problem solving.
Репетиторов онлайн России в скайпе и просто в Москве: GMAT math.
repetitor-chastnye-uroki.blogspot.com

GMAT math – everything you need to know

This ability will come with practice. The average score in GMAT Math is thirty five. If you want to pass the Quantative section well you should pay attention to the formulas and special mathematical terms which are usually used in the test. See repetitor-matematik.blogspot.ru