Question

the symbol of tungston is ?​

Answer 1

Explanation:

This is a classic example of finding mean and standard deviation using Z values.

From this page find the Z value corresponding to 31% area under the curve and 92% (100-8) percent area under the curve.

Math Is Fun Virtual Manipulative

Note: You'll probably be given tables to lookup in your quizzes.. they're a bit confusing. But you might as well learn how to use it.

As you know:

Z=X−μσZ=X−μσ

Put in X and Z values values twice, you'll have two linear equations. Solve them and the answer is yours!

आपसे मिलकर बहुत अच्छा लगा आपके क्वेश्चन का आंसर देख मुझे बहुत अच्छा लगा आपका नाम बता दीजिएगा अपने दूसरे को सन में मैं आपका इंतजार करूंगा फिर आसिफ अली की