BIOLOGY जीव विज्ञान ( IMPORTANT SCIENTIFIC NAMES)

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यदि कोई व्यक्ति किसी निश्चित दूरी को X कि0 मी0/ घंटा की रफ्तार से तथा उसी दूरी को Y किलोमीटर/घंटा की रफ्तार से तय करे तो उसकी औसत चाल क्या होगी ?

इसका सरलतम सूत्र है

= 2xy

    x+yऔर यदि वह तीन विभिन्न चालों से चले(xyz)

तो सूत्र होगा

=    3 xyz
xy+yz+zx

एक कक्षा के 40 छात्रों द्वारा प्राप्त अंको का औसत 86  है यदि 5 सर्वाधिक अंको को निकाल दिया जाये तो औसत एक अंक कम हो जाता है शीर्ष 5 छात्रों के औसत अंक बताइये (SSC CGL  2014)

हल:

सबसे पहले हम अभी अंको का योग निकालेंगे

= 86 x 40 = 3440

अब जो योग उन पाँच अंको को निकालने के बाद बनेगा वह है

= 35 x 85 = 2975

दोनों का अंतर = 3440 – 2975 = 465

ये है उन पाँच अंको का योग, अब इसका औसत निकालेंगे

= 465
5

= 93  उत्तर

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RRB Recruitment July 2018: Huge Group C, Group D Vacancies announced

Name of Posts and Number of Vacancies:

Fitter-1129 Posts
Welder (Gas & Electric)-174 Posts
Carpenter-167 Posts
Painter (General) -77 Posts
Tailor (General) -18 Posts
Electrician -526 Posts
Machinist-159 Posts
Programming & Systems Administration Assistant-12 Posts
Mechanic Diesel-126 Posts
Laboratory Assistant (CP)-8 Posts
Sheet Metal Worker -27 Posts
Instrument Mechanic -5 Posts
Turner-25 Posts
Winder (Armature) -37 Posts
Tool & Die Maker (Press Tools Jigs & Fixtures)- 68 Posts
Programming & Systems Administration Assistant & Information Technology & Electronic System Maintenance-2 Posts

Educational/Technical Qualification & Experience: A candidate wishing to apply for the Apprentice Trainee posts should have passed Class 10 with minimum 50% and ITI in the concerned trade.

Selection Process: The selection of candidates will be based on the academic merit and later an interview might be conducted before final selection.

Application Fee: Applicants will have to pay an application fee of Rs 100 to apply for the apprentice post.

How to Apply: Online applications will be accepted through the official recruitment portal of RRC.

NOTE: The last date for application is July 25, 2018 (05 PM).

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