Can we get admission in ISB Hyderabad through a recommendation?

The straight answer is no, you can’t. Also, there is no cutoff system, it all depends on which field you belong to. For example, average GMAT scores may be higher for Indian IT Male because of the competition but relatively less for say artists (Since the number of artists applying is lower).

However, you can check the proper admission procedure for various courses in ISB Hyderabad here. 

For PGP:

Selection criteria- GRE/GMAT (TOEFL / IELTS / PTE score required only if the language of instruction at the undergraduate study level was not English)

Eligibility-

• You must hold a bachelor's degree or equivalent in any discipline
• You must have at least 24 months of full-time post-qualification work experience as of March 31 of that year.

For PGPPro:

Selection Criteria- Application-based

Eligibility-

• You should have a bachelor's degree or equivalent qualification in any discipline. An equivalent qualification will be determined by the Admission Committee of the program and will include the likes of CA, ICWA, etc.
• You should possess a minimum of 5+ years of full-time work experience.

For PGPMAX:

Selection Criteria- Application-based

Eligibility-

• You should have a bachelor's degree or equivalent qualification in any discipline. An equivalent qualification will be determined by the Admission Committee of the program and will include the likes of CA, ICWA, etc.
• You should possess a minimum of 10 years of full-time work experience as of the date of submitting the application (desired experience is closer to 15 or more years).

For FPM:

Selection Criteria- GMAT / GRE / CAT / GATE / JRF ( TOEFL score report, for applicants whose language of instruction at the undergraduate level is not English )

Eligibility-

• You must hold a university degree from an accredited academic institution. Applicants typically should have an undergraduate/postgraduate degree in areas such as business, economics, engineering, computer sciences, mathematics, physics, or the arts.

For EFPM:

Selection Criteria- Application-based

Eligibility-

• You must hold a university degree from an accredited academic institution. Applicants typically should have an undergraduate/postgraduate degree in areas such as business, economics, engineering, computer sciences, mathematics, physics, or the arts. An MBA or business-focused master's degree is a plus but not mandatory.
• You must have exceptional verbal communication and written skills
• 8+ years of professional working experience

For MFAB:

Selection Criteria-Business Aptitude Test (BAT)

Eligibility-

• Bachelors' Degree or an equivalent qualification (like CA, etc.) Applicants should have completed graduation during the submission of the application.
• Nowadays they have made work experience mandatory. However, ISB believes that an experience of 2-3 years will be valuable for you.

Although your scores and performance matter the most, ISB also judges you on the basis of Leadership potential, Diversity, and Academic Credentials.